diff --git a/app/build.gradle b/app/build.gradle
index 637864d7..15b3b2b5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -44,10 +44,8 @@ android {
     }
     buildTypes {
         debug {
-            minifyEnabled false
-            shrinkResources false
-
-            multiDexEnabled true
+            minifyEnabled true
+            shrinkResources true
 
             debuggable true
             applicationIdSuffix ".debug"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8d3b3cfa..1ddb7c2b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -8,6 +8,7 @@
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
     <uses-permission android:name="android.permission.USE_BIOMETRIC" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="21"/>
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="21"/>
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.VIBRATE"/>
diff --git a/app/src/main/java/xyz/quaver/pupil/adapters/SearchResultsAdapter.kt b/app/src/main/java/xyz/quaver/pupil/adapters/SearchResultsAdapter.kt
index 7daa1976..eedcc9d2 100644
--- a/app/src/main/java/xyz/quaver/pupil/adapters/SearchResultsAdapter.kt
+++ b/app/src/main/java/xyz/quaver/pupil/adapters/SearchResultsAdapter.kt
@@ -151,12 +151,14 @@ class SearchResultsAdapter(private val results: List<ItemInfo>) : RecyclerSwipeA
 
             binding.artist.text = result.artists
 
-            with (binding.tagGroup) {
-                tags.clear()
-                tags.addAll(result.tags.map {
-                    Tag.parse(it)
-                })
-                refresh()
+            CoroutineScope(Dispatchers.Main).launch {
+                with (binding.tagGroup) {
+                    tags.clear()
+                    result.extra[ItemInfo.ExtraType.TAGS]?.await()?.split(", ")?.map {
+                        Tag.parse(it)
+                    }?.let { tags.addAll(it) }
+                    refresh()
+                }
             }
 
             val extraType = listOf(
diff --git a/app/src/main/java/xyz/quaver/pupil/sources/Common.kt b/app/src/main/java/xyz/quaver/pupil/sources/Common.kt
index 938dfc5b..09ad6432 100644
--- a/app/src/main/java/xyz/quaver/pupil/sources/Common.kt
+++ b/app/src/main/java/xyz/quaver/pupil/sources/Common.kt
@@ -40,7 +40,6 @@ data class ItemInfo(
     val title: String,
     val thumbnail: String,
     val artists: String,
-    val tags: List<String>,
     val extra: Map<ExtraType, Deferred<String?>> = emptyMap()
 ) {
     enum class ExtraType {
@@ -48,8 +47,11 @@ data class ItemInfo(
         CHARACTER,
         SERIES,
         TYPE,
+        TAGS,
         LANGUAGE,
-        PAGECOUNT
+        PAGECOUNT,
+        PREVIEW,
+        RELATED_ITEM,
     }
 
     @Serializable
@@ -60,7 +62,6 @@ data class ItemInfo(
         val title: String,
         val thumbnail: String,
         val artists: String,
-        val tags: List<String>,
         val extra: Map<ExtraType, String?> = emptyMap()
     )
 
@@ -74,7 +75,6 @@ data class ItemInfo(
                 value.title,
                 value.thumbnail,
                 value.artists,
-                value.tags,
                 value.extra.mapValues { runBlocking { it.value.await() } }
             )
             encoder.encodeSerializableValue(ItemInfoSurrogate.serializer(), surrogate)
@@ -88,7 +88,6 @@ data class ItemInfo(
                 surrogate.title,
                 surrogate.thumbnail,
                 surrogate.artists,
-                surrogate.tags,
                 surrogate.extra.mapValues { CoroutineScope(Dispatchers.Unconfined).async { it.value } }
             )
         }
@@ -119,7 +118,7 @@ abstract class Source<Query_SortMode: Enum<Query_SortMode>, Suggestion: SearchSu
     abstract suspend fun search(query: String, range: IntRange, sortMode: Enum<*>) : Pair<Channel<ItemInfo>, Int>
     abstract suspend fun suggestion(query: String) : List<Suggestion>
     abstract suspend fun images(id: String) : List<String>
-    /* abstract suspend */ fun info(id: String)/* : ItemInfo */{}
+    abstract suspend fun info(id: String) : ItemInfo
 
     open fun getHeadersForImage(id: String, url: String): Map<String, String> {
         return emptyMap()
diff --git a/app/src/main/java/xyz/quaver/pupil/sources/Hitomi.kt b/app/src/main/java/xyz/quaver/pupil/sources/Hitomi.kt
index 09b31e92..40c089cc 100644
--- a/app/src/main/java/xyz/quaver/pupil/sources/Hitomi.kt
+++ b/app/src/main/java/xyz/quaver/pupil/sources/Hitomi.kt
@@ -18,7 +18,6 @@
 
 package xyz.quaver.pupil.sources
 
-import android.util.Log
 import android.view.LayoutInflater
 import android.widget.TextView
 import kotlinx.coroutines.*
@@ -93,6 +92,12 @@ class Hitomi : Source<Hitomi.SortMode, Hitomi.TagSuggestion>() {
         return Pair(channel, cache.size)
     }
 
+    override suspend fun suggestion(query: String) : List<TagSuggestion> {
+        return getSuggestionsForQuery(query.takeLastWhile { !it.isWhitespace() }).map {
+            TagSuggestion(it)
+        }
+    }
+
     override suspend fun images(id: String): List<String> {
         val galleryID = id.toInt()
 
@@ -103,18 +108,35 @@ class Hitomi : Source<Hitomi.SortMode, Hitomi.TagSuggestion>() {
         }
     }
 
+    override suspend fun info(id: String): ItemInfo = coroutineScope {
+        getGallery(id.toInt()).let {
+            ItemInfo(
+                name,
+                id,
+                it.title,
+                it.cover,
+                it.artists.joinToString { it.wordCapitalize() },
+                mapOf(
+                    ExtraType.TYPE to async { it.type.wordCapitalize() },
+                    ExtraType.GROUP to async { it.groups.joinToString { it.wordCapitalize() } },
+                    ExtraType.LANGUAGE to async { languageMap[it.language] ?: it.language },
+                    ExtraType.SERIES to async { it.series.joinToString { it.wordCapitalize() } },
+                    ExtraType.CHARACTER to async { it.characters.joinToString { it.wordCapitalize() } },
+                    ExtraType.TAGS to async { it.tags.joinToString() },
+                    ExtraType.PREVIEW to async { it.thumbnails.joinToString() },
+                    ExtraType.RELATED_ITEM to async { it.related.joinToString() },
+                    ExtraType.PAGECOUNT to async { it.thumbnails.size.toString() },
+                )
+            )
+        }
+    }
+
     override fun getHeadersForImage(id: String, url: String): Map<String, String> {
         return mapOf(
             "Referer" to getReferer(id.toInt())
         )
     }
 
-    override suspend fun suggestion(query: String) : List<Hitomi.TagSuggestion> {
-        return getSuggestionsForQuery(query.takeLastWhile { !it.isWhitespace() }).map {
-            TagSuggestion(it)
-        }
-    }
-
     override fun onSuggestionBind(binding: SearchSuggestionItemBinding, item: TagSuggestion) {
         binding.leftIcon.setImageResource(
             when(item.n) {
@@ -195,7 +217,6 @@ class Hitomi : Source<Hitomi.SortMode, Hitomi.TagSuggestion>() {
                 galleryBlock.title,
                 galleryBlock.thumbnails.first(),
                 galleryBlock.artists.joinToString { it.wordCapitalize() },
-                galleryBlock.relatedTags,
                 mapOf(
                     ExtraType.GROUP to CoroutineScope(Dispatchers.IO).async { kotlin.runCatching {
                         getGallery(galleryBlock.id).groups.joinToString { it.wordCapitalize() }
@@ -205,7 +226,8 @@ class Hitomi : Source<Hitomi.SortMode, Hitomi.TagSuggestion>() {
                     ExtraType.LANGUAGE to CoroutineScope(Dispatchers.Unconfined).async { languageMap[galleryBlock.language] ?: galleryBlock.language },
                     ExtraType.PAGECOUNT to CoroutineScope(Dispatchers.IO).async { kotlin.runCatching {
                         getGalleryInfo(galleryBlock.id).files.size.toString()
-                    }.getOrNull() }
+                    }.getOrNull() },
+                    ExtraType.TAGS to CoroutineScope(Dispatchers.Unconfined).async { galleryBlock.relatedTags.joinToString() }
                 )
             )
     }
diff --git a/app/src/main/java/xyz/quaver/pupil/sources/Hiyobi.kt b/app/src/main/java/xyz/quaver/pupil/sources/Hiyobi.kt
index 3c20f260..e1c084ba 100644
--- a/app/src/main/java/xyz/quaver/pupil/sources/Hiyobi.kt
+++ b/app/src/main/java/xyz/quaver/pupil/sources/Hiyobi.kt
@@ -78,6 +78,10 @@ class Hiyobi : Source<DefaultSortMode, DefaultSearchSuggestion>() {
         }
     }
 
+    override suspend fun info(id: String): ItemInfo {
+        return transform(name, getGalleryBlock(id))
+    }
+
     override fun onSuggestionBind(binding: SearchSuggestionItemBinding, item: DefaultSearchSuggestion) {
         val split = item.body.split(':', limit = 2)
 
@@ -121,13 +125,13 @@ class Hiyobi : Source<DefaultSortMode, DefaultSearchSuggestion>() {
                 galleryBlock.title,
                 "https://cdn.$hiyobi/tn/${galleryBlock.id}.jpg",
                 galleryBlock.artists.joinToString { it.value.wordCapitalize() },
-                galleryBlock.tags.map { it.value },
                 mapOf(
                     ItemInfo.ExtraType.CHARACTER to async { galleryBlock.characters.joinToString { it.value.wordCapitalize() } },
                     ItemInfo.ExtraType.SERIES to async { galleryBlock.parodys.joinToString { it.value.wordCapitalize() } },
                     ItemInfo.ExtraType.TYPE to async { galleryBlock.type.name.replace('_', ' ').wordCapitalize() },
                     ItemInfo.ExtraType.PAGECOUNT to async { getGalleryInfo(galleryBlock.id).files.size.toString() },
-                    ItemInfo.ExtraType.GROUP to async { galleryBlock.groups.joinToString { it.value.wordCapitalize() } }
+                    ItemInfo.ExtraType.GROUP to async { galleryBlock.groups.joinToString { it.value.wordCapitalize() } },
+                    ItemInfo.ExtraType.TAGS to async { galleryBlock.tags.joinToString() { it.value } }
                 )
             )
         }
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/dialog/DownloadLocationDialogFragment.kt b/app/src/main/java/xyz/quaver/pupil/ui/dialog/DownloadLocationDialogFragment.kt
index cc370f13..c3ffa33a 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/dialog/DownloadLocationDialogFragment.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/dialog/DownloadLocationDialogFragment.kt
@@ -143,6 +143,7 @@ class DownloadLocationDialogFragment : DialogFragment() {
 
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                     val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+                        flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
                         putExtra("android.content.extra.SHOW_ADVANCED", true)
                     }
 
diff --git a/app/src/main/java/xyz/quaver/pupil/util/downloader/DownloadManager.kt b/app/src/main/java/xyz/quaver/pupil/util/downloader/DownloadManager.kt
index e8364b46..2ece9e06 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/downloader/DownloadManager.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/downloader/DownloadManager.kt
@@ -20,6 +20,7 @@ package xyz.quaver.pupil.util.downloader
 
 import android.content.Context
 import android.content.ContextWrapper
+import android.net.Uri
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
diff --git a/app/src/main/java/xyz/quaver/pupil/util/downloader/Downloader.kt b/app/src/main/java/xyz/quaver/pupil/util/downloader/Downloader.kt
index 864f12f0..e3d001ff 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/downloader/Downloader.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/downloader/Downloader.kt
@@ -18,7 +18,13 @@
 
 package xyz.quaver.pupil.util.downloader
 
+import android.annotation.SuppressLint
+import android.app.PendingIntent
 import android.content.Context
+import android.content.Intent
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import androidx.core.app.TaskStackBuilder
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -26,10 +32,14 @@ import kotlinx.coroutines.launch
 import okhttp3.*
 import okio.*
 import xyz.quaver.pupil.PupilInterceptor
+import xyz.quaver.pupil.R
 import xyz.quaver.pupil.client
 import xyz.quaver.pupil.interceptors
+import xyz.quaver.pupil.services.DownloadService
 import xyz.quaver.pupil.sources.sources
+import xyz.quaver.pupil.ui.ReaderActivity
 import xyz.quaver.pupil.util.cleanCache
+import xyz.quaver.pupil.util.normalizeID
 import java.io.IOException
 import java.util.concurrent.ConcurrentHashMap
 
@@ -51,6 +61,79 @@ class Downloader private constructor(private val context: Context) {
         }
     }
 
+    //region Notification
+    private val notificationManager by lazy {
+        NotificationManagerCompat.from(context)
+    }
+
+    private val serviceNotification by lazy {
+        NotificationCompat.Builder(context, "downloader")
+            .setContentTitle(context.getString(R.string.downloader_running))
+            .setProgress(0, 0, false)
+            .setSmallIcon(R.drawable.ic_notification)
+            .setOngoing(true)
+    }
+
+    private val notification = ConcurrentHashMap<String, NotificationCompat.Builder?>()
+
+    private fun initNotification(source: String, itemID: String) {
+        val key = "$source-$itemID"
+
+        val intent = Intent(context, ReaderActivity::class.java)
+            .putExtra("source", source)
+            .putExtra("itemID", itemID)
+
+        val pendingIntent = TaskStackBuilder.create(context).run {
+            addNextIntentWithParentStack(intent)
+            getPendingIntent(itemID.hashCode(), PendingIntent.FLAG_UPDATE_CURRENT)
+        }
+        val action =
+            NotificationCompat.Action.Builder(0, context.getText(android.R.string.cancel),
+                PendingIntent.getService(
+                    context,
+                    R.id.notification_download_cancel_action.normalizeID(),
+                    Intent(context, DownloadService::class.java)
+                        .putExtra(DownloadService.KEY_COMMAND, DownloadService.COMMAND_CANCEL)
+                        .putExtra(DownloadService.KEY_ID, itemID),
+                    PendingIntent.FLAG_UPDATE_CURRENT),
+            ).build()
+
+        notification[key] = NotificationCompat.Builder(context, "download").apply {
+            setContentTitle(context.getString(R.string.reader_loading))
+            setContentText(context.getString(R.string.reader_notification_text))
+            setSmallIcon(R.drawable.ic_notification)
+            setContentIntent(pendingIntent)
+            addAction(action)
+            setProgress(0, 0, true)
+            setOngoing(true)
+        }
+
+        notify(source, itemID)
+    }
+
+    @SuppressLint("RestrictedApi")
+    private fun notify(source: String, itemID: String) {
+        val key = "$source-$itemID"
+        val max = progress[key]?.size ?: 0
+        val progress = progress[key]?.count { it == Float.POSITIVE_INFINITY } ?: 0
+
+        val notification = notification[key] ?: return
+
+        if (isCompleted(source, itemID)) {
+            notification
+                .setContentText(context.getString(R.string.reader_notification_complete))
+                .setProgress(0, 0, false)
+                .setOngoing(false)
+                .mActions.clear()
+
+            notificationManager.cancel(key.hashCode())
+        } else
+            notification
+                .setProgress(max, progress, false)
+                .setContentText("$progress/$max")
+    }
+    //endregion
+
     //region ProgressListener
     @Suppress("UNCHECKED_CAST")
     private val progressListener: ProgressListener = { (source, itemID, index), bytesRead, contentLength, done ->
@@ -134,6 +217,8 @@ class Downloader private constructor(private val context: Context) {
         return progress["$source-$itemID"]
     }
 
+    fun isCompleted(source: String, itemID: String) = progress["$source-$itemID"]?.all { it == Float.POSITIVE_INFINITY } == true
+
     fun cancel() {
         client.dispatcher().queuedCalls().filter {
             it.request().tag() is Tag
@@ -178,6 +263,7 @@ class Downloader private constructor(private val context: Context) {
         if (isDownloading(source, itemID))
             return@launch
 
+        initNotification(source, itemID)
         cleanCache(context)
 
         val source = sources[source] ?: return@launch
@@ -188,15 +274,8 @@ class Downloader private constructor(private val context: Context) {
                 if (cache.metadata.imageList?.get(i) == null) 0F else Float.POSITIVE_INFINITY
             }
 
-            with (Cache.getInstance(context, source.name, itemID).metadata) {
-                if (imageList == null)
-                    imageList = MutableList(it.size) { null }
-
-                imageList!!.forEachIndexed { index, s ->
-                    if (s != null)
-                        progress["${source.name}-$itemID"]?.set(index, Float.POSITIVE_INFINITY)
-                }
-            }
+            if (cache.metadata.imageList == null)
+                cache.metadata.imageList = MutableList(it.size) { null }
 
             onImageListLoadedCallback?.invoke(it)
         }.forEachIndexed { index, url ->