TV series
A mysterious switch appeared one day. Upon pressing it, they were sent to a different alternative world!! There are also characters from other alternative worlds gathered together...!?
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Checked Jul 22, 2026
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A mysterious switch appeared one day. Upon pressing it, they were sent to a different alternative world!! There are also characters from other alternative worlds gathered together...!?
Cast, crew and production details
Aoi YuukiTanya Degurechaff (voice)
Jun FukushimaKazuma Satou (voice)
Rie TakahashiEmilia / Megumin (voice)
Saori HayamiViktoriya Ivanovna 'Visha' Serebryakov (voice)
Satoshi HinoMomonga / Ains Oooal Gown (voice)
Sora AmamiyaAqua (voice)
Yumi HaraAlbedo (voice)
Emiri KatoAura Bella Fiora (voice)
ABEMAJapan
Studio PuyukaiJapan
KADOKAWAJapanWatch options above are for the show and may vary by season or episode.
Episode 1
Mysterious buttons appear in the worlds of Tanya the Evil, KonoSuba, Overlord, and Re:Zero. When the characters push them, they're taken to a place they'd never imagined...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 2
Now that everybody's settled in, it's time for the first day of school, which means everybody has to introduce themselves.
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 3
The students begin to wonder about why they are here, and what this school really is. Tanya, in particular, has a theory about Ains...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 4
The students realize that they're all from other worlds, and begin to share their backgrounds. But some are luckier than others...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 5
It's time for the talent show, but none of the students are talented at all. The KonoSuba crowd in particular...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 6
It's time to pick the class rep! But Aqua doesn't want Ains to do it, and Albedo doesn't want Aqua anywhere near the job.
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 7
Emilia's the class rep now, but it's really hard. But she wants to do her best!
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 8
It's time for a field trip to the beach, and the gang's getting ready. But who wants to see Kazuma in a swimsuit?
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 9
The field trip is here, and it's great! Everybody's at the beach and having a great time. But Tanya hears something that makes her upset...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 10
It's time for Field Day, and Roswaal hints that whoever wins will get to go home. But then they meet their opponents...
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 11
Field Day is here, and it's lots of fun for everyone. There's tug of war, scavenger hunts... and giant robots?!
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai Quartet
Episode 12
The mobile fortress "Destroyer" has joined the last game! It's up to the quartet to grab its headband and win the game.
Directed by Minoru AshinaWritten by Minoru Ashina
Where to watch Isekai QuartetEpisode information updated Jul 22, 2026
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