diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/model/Manga.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/model/Manga.kt
index c8bf3b80..39c14b79 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/model/Manga.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/model/Manga.kt
@@ -94,6 +94,7 @@ class Manga(
 		largeCoverUrl: String? = this.largeCoverUrl,
 		description: String? = this.description,
 		chapters: List<MangaChapter>? = this.chapters,
+		source: MangaSource = this.source,
 	) = Manga(
 		id = id,
 		title = title,
@@ -109,7 +110,7 @@ class Manga(
 		largeCoverUrl = largeCoverUrl,
 		description = description,
 		chapters = chapters,
-		source = source
+		source = source,
 	)
 
 	override fun equals(other: Any?): Boolean {
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt
index 7fcdab8f..8435e190 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt
@@ -4,6 +4,7 @@ import kotlinx.coroutines.flow.channelFlow
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import okhttp3.Headers
+import okhttp3.HttpUrl
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import okhttp3.Interceptor
@@ -112,7 +113,8 @@ internal abstract class GroupleParser(
 	}
 
 	override suspend fun getDetails(manga: Manga): Manga {
-		val doc = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).checkAuthRequired().parseHtml()
+		val response = webClient.httpGet(manga.url.toAbsoluteUrl(domain)).checkAuthRequired()
+		val doc = response.parseHtml()
 		val root = doc.body().requireElementById("mangaBox").selectFirstOrThrow("div.leftContent")
 		val dateFormat = SimpleDateFormat("dd.MM.yy", Locale.US)
 		val coverImg = root.selectFirst("div.subject-cover")?.selectFirst("img")
@@ -125,7 +127,9 @@ internal abstract class GroupleParser(
 		} else {
 			null
 		}
+		val newSource = getSource(response.request.url)
 		return manga.copy(
+			source = newSource,
 			description = root.selectFirst("div.manga-description")?.html(),
 			largeCoverUrl = coverImg?.attr("data-full"),
 			coverUrl = coverImg?.attr("data-thumb") ?: manga.coverUrl,
@@ -160,7 +164,7 @@ internal abstract class GroupleParser(
 								url = href,
 								uploadDate = dateFormat.tryParse(tr.selectFirst("td.date")?.text()),
 								scanlator = translators,
-								source = source,
+								source = newSource,
 								branch = null,
 							),
 						)
@@ -177,7 +181,7 @@ internal abstract class GroupleParser(
 								url = link,
 								uploadDate = dateFormat.tryParse(jo.getStringOrNull("dateCreated")),
 								scanlator = null,
-								source = source,
+								source = newSource,
 								branch = translations[personId],
 							)
 						}
@@ -187,7 +191,11 @@ internal abstract class GroupleParser(
 	}
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
-		val doc = webClient.httpGet(chapter.url.toAbsoluteUrl(domain) + "?mtr=1").checkAuthRequired().parseHtml()
+		if (chapter.source != source) { // handle redirects between websites
+			return context.newParserInstance(chapter.source).getPages(chapter)
+		}
+		val url = chapter.url.toAbsoluteUrl(domain).toHttpUrl().newBuilder().setQueryParameter("mtr", "1").build()
+		val doc = webClient.httpGet(url).checkAuthRequired().parseHtml()
 		val scripts = doc.select("script")
 		for (script in scripts) {
 			val data = script.html()
@@ -292,6 +300,14 @@ internal abstract class GroupleParser(
 		return root.select("div.tile").mapNotNull(::parseManga)
 	}
 
+	protected open fun getSource(url: HttpUrl): MangaSource = when (url.host) {
+		in SeiMangaParser.domains -> MangaSource.SEIMANGA
+		in MintMangaParser.domains -> MangaSource.MINTMANGA
+		in ReadmangaParser.domains -> MangaSource.READMANGA_RU
+		in SelfMangaParser.domains -> MangaSource.SELFMANGA
+		else -> source
+	}
+
 	private fun getSortKey(sortOrder: SortOrder) = when (sortOrder) {
 		SortOrder.ALPHABETICAL -> "name"
 		SortOrder.POPULARITY -> "rate"
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/MintMangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/MintMangaParser.kt
index ed2a77d6..205225d1 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/MintMangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/MintMangaParser.kt
@@ -10,9 +10,14 @@ internal class MintMangaParser(
 	context: MangaLoaderContext,
 ) : GroupleParser(context, MangaSource.MINTMANGA, 2) {
 
-	override val configKeyDomain = ConfigKey.Domain(
-		"24.mintmanga.one",
-		"mintmanga.live",
-		"mintmanga.com",
-	)
+	override val configKeyDomain = ConfigKey.Domain(*domains)
+
+	companion object {
+
+		val domains = arrayOf(
+			"24.mintmanga.one",
+			"mintmanga.live",
+			"mintmanga.com",
+		)
+	}
 }
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/ReadmangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/ReadmangaParser.kt
index 473f8b2a..423fec3f 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/ReadmangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/ReadmangaParser.kt
@@ -10,9 +10,14 @@ internal class ReadmangaParser(
 	context: MangaLoaderContext,
 ) : GroupleParser(context, MangaSource.READMANGA_RU, 1) {
 
-	override val configKeyDomain = ConfigKey.Domain(
-		"readmanga.live",
-		"readmanga.io",
-		"readmanga.me",
-	)
+	override val configKeyDomain = ConfigKey.Domain(*domains)
+
+	companion object {
+
+		val domains = arrayOf(
+			"readmanga.live",
+			"readmanga.io",
+			"readmanga.me",
+		)
+	}
 }
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SeiMangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SeiMangaParser.kt
new file mode 100644
index 00000000..173c699c
--- /dev/null
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SeiMangaParser.kt
@@ -0,0 +1,21 @@
+package org.koitharu.kotatsu.parsers.site.ru.grouple
+
+import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.parsers.MangaSourceParser
+import org.koitharu.kotatsu.parsers.config.ConfigKey
+import org.koitharu.kotatsu.parsers.model.MangaSource
+
+@MangaSourceParser("SEIMANGA", "SeiManga", "ru")
+internal class SeiMangaParser(
+	context: MangaLoaderContext,
+) : GroupleParser(context, MangaSource.SEIMANGA, 21) {
+
+	override val configKeyDomain = ConfigKey.Domain(*domains)
+
+	companion object {
+
+		val domains = arrayOf(
+			"seimanga.me",
+		)
+	}
+}
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SelfMangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SelfMangaParser.kt
index a37884bd..6bd59bc5 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SelfMangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/SelfMangaParser.kt
@@ -11,6 +11,12 @@ internal class SelfMangaParser(
 	context: MangaLoaderContext,
 ) : GroupleParser(context, MangaSource.SELFMANGA, 3) {
 
-	override val configKeyDomain = ConfigKey.Domain("selfmanga.live")
+	override val configKeyDomain = ConfigKey.Domain(*domains)
 
+	companion object {
+
+		val domains = arrayOf(
+			"selfmanga.live",
+		)
+	}
 }