Isekai Quartet Relay PVs

A comprehensive watch order of the Overlord series, which includes every entry in the Overlord franchise.

This guide is fully maintained, retouched, reorganized and updated by yours truly.

All other published "Series Guides" by me that might interest you:
https://myanimelist.net/profile/nrhkm/stacks

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MAIN SERIES
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1. Overlord
TV - 13 x 24 minute long episodes. R - 17+ rated.
First season of the series. Adapts volumes 1, 2 and 3 of the Light Novel.

1-2. Overlord: Ple Ple Pleiades
Special - 8 x 3 minute long episodes. PG-13 rated.
Specials bundled with the Blu-ray and DVD volumes featuring simplified character animations.

1-3. Ple Ple Pleiades Special Edition
OVA - 1 x 5 minute long episode. PG-13 rated.
Special edition of Ple Ple Pleiades to commemorate the release of the first Blu-ray and DVD volume.

2. Overlord: Oukoku no Kan-tachi - Drama CD-tsuki Tokusou-ban
ONA - 1 x 5 minute long video. PG-13 rated.
Picture drama trailer to promote the deluxe edition of the Light Novel's 6th volume which has the full audio drama released on CD included.

3. Overlord: Ple Ple Pleiades - Nazarick Saidai no Kiki
OVA - 1 x 30 minute long episode. PG-13 rated.
OVA bundled with the Light Novel's 11th volume.

4. Overlord: Ple Ple Pleiades - Clementine Toubou-hen
ONA - 3 x 10 minute long episodes. PG-13 rated.
Clementine Escape Edition of the Ple Ple Pleiades spin-off that was released exclusively on Hikari TV.

5-0. Overlord Movie: Manner Movie
Special - 1 x 1 minute long episode. G rated.
A theater manners short bundled with the movie's Blu-ray and DVD releases.

5. Overlord Movie 1: Fushisha no Ou
Movie - 1h 42 minutes long. R - 17+ rated.
First Overlord recap film.

5-1. Overlord Movie 2: Shikkoku no Eiyuu
Movie - 1h 33 minutes long. R - 17+ rated.
Second Overlord recap film.

5-2. Overlord Movie: Ple Ple Pleiades
Special - 2 x 13 minute long episodes. PG-13 rated.
Specials bundled with the Blu-ray and DVD volumes of Overlord Movie 1 and 2.

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6. Overlord II
TV - 13 x 23 minute long episodes. R - 17+ rated.
Second season of the series. Adapts volumes 4, 5 and 6 of the Light Novel.

6-1. Overlord: Ple Ple Pleiades 2
ONA - 13 x 2 minute long episodes. PG-13 rated.
Parody shorts of Overlord II streamed on Kadokawa's official YouTube channel.

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7. Overlord III
TV - 13 x 23 minute long episodes. R - 17+ rated.
Third season of the series. Adapts volumes 7, 8 and 9 of the Light Novel.

7-1. Overlord: Ple Ple Pleiades 3
ONA - 13 x 2 minute long episodes. PG-13 rated.
Parody shorts of Overlord III streamed on Kadokawa's official YouTube channel.

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8. Overlord IV
TV - 13 x 23 minute long episodes. R - 17+ rated.
Fourth season of the series. Adapts volumes 10, 11, and 14 of the Light Novel.

8-1. Overlord: Ple Ple Pleiades 4
ONA - 13 x 2 minute long episodes. PG-13 rated.
Parody shorts of Overlord IV streamed on Kadokawa's official YouTube channel.

8-2. Overlord Movie 3: Sei Oukoku-hen
Movie - ?h ? minutes long. R - 17+ rated.
Not yet aired. Adapts volumes 12 and 13 of the Light Novel.

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PARODY UNIVERSE
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1-0. Isekai Quartet Relay PVs
PV - 4 x 1 minute long episodes. PG-13 rated.
Teasers with original animation that was not included in the TV release.

1. Isekai Quartet
TV - 12 x 11 minute long episodes. PG-13 rated.
First installment in the crossover series featuring characters from Overlord, KonoSuba, Re:Zero and Saga of Tanya the Evil.

1-1. Isekai Quartet 2
TV - 12 x 11 minute long episodes. PG-13 rated.
Second installment in the crossover series with characters from Rising of the Shield Hero and Cautious Hero joining the initial featured casts.

1-2. Isekai Quartet Movie: Another World
Movie - 1h 52 minutes long. PG-13 rated.
Sequel film with the same cast of characters from both first and second installments and also featuring new one-off original characters.

1-3. Isekai Quartet 3
TV - 12 x 11 minute long episodes. PG-13 rated.
Third installment in the crossover series with characters from The Eminence in Shadow joining the featured casts from both first and second installments.

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2. Ple Ple Pleiades × Kagejitsu!
ONA - 1 x 10 minute long episode. PG-13 rated.
Crossover spin-off of Overlord: Ple Ple Pleiades with Kagejitsu! Second.

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Resources used:
https://myanimelist.net/forum/?topicid=1863965
https://myanimelist.net/forum/?topicid=2017008
https://chiaki.site/?/tools/watch_order

Special thanks and credits to:
https://myanimelist.net/profile/_cjessop19_
https://myanimelist.net/profile/User-Name
https://myanimelist.net/clubs.php?cid=79626

anime which doesnt take itself seriously/has a big comedy aspect

A comprehensive watch order of The Rising of the Shield Hero series, which includes every entry in The Rising of the Shield Hero franchise.

This guide is fully maintained, retouched, reorganized and updated by yours truly.

All other published "Series Guides" by me that might interest you:
https://myanimelist.net/profile/nrhkm/stacks

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MAIN SERIES
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1. Tate no Yuusha no Nariagari
TV - 25 x 24 minute long episodes. PG-13 rated.
First season of the series.

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2. Tate no Yuusha no Nariagari Season 2
TV - 13 x 23 minute long episodes. PG-13 rated.
Second season of the series.

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3. Tate no Yuusha no Nariagari Season 3
TV - 12 x 23 minute long episodes. PG-13 rated.
Third season of the series.

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4. Tate no Yuusha no Nariagari Season 4
TV - ? x ? minute long episodes. PG-13 rated.
Not yet aired. Fourth season of the series.

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PARODY UNIVERSE
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1-0. Isekai Quartet Relay PVs
PV - 4 x 1 minute long episodes. PG-13 rated.
Teasers with original animation that was not included in the TV release.

1. Isekai Quartet
TV - 12 x 11 minute long episodes. PG-13 rated.
First installment in the crossover series featuring characters from Overlord, KonoSuba, Re:Zero and Saga of Tanya the Evil.

1-1. Isekai Quartet 2
TV - 12 x 11 minute long episodes. PG-13 rated.
Second installment in the crossover series with characters from Rising of the Shield Hero and Cautious Hero joining the initial featured casts.

1-2. Isekai Quartet Movie: Another World
Movie - 1h 52 minutes long. PG-13 rated.
Sequel film with the same cast of characters in the previous two installments and featuring new original characters.

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Resources used:
https://myanimelist.net/forum/?topicid=1863965
https://chiaki.site/?/tools/watch_order

Special thanks and credits to:
https://myanimelist.net/profile/_cjessop19_
https://myanimelist.net/clubs.php?cid=79626

All Media Guide.

This is a list that ONLY includes all these isekais' chibi content done by Studio PuYUKAI, and the Isekai Quartet series that relates to said isekais. All of these are not necessary to watch Isekai Quartet. It'll be (almost) ordered by release, with each entry having the necessary shows / content listed to understand it, although it doesn't really matter much if all the people on this stack have likely already seen all of the shows included in Isekai Quartet.

Would I recommend going through it all? Not really, it's a big hassle to find everything. But I highly recommend this to any completionist like myself since it heightens the Isekai Quartet watching experience, or to Re:Zero fans when it comes to Break Time and Isekai Quartet, since there's a good amount of accompanying canon content as well as some big lore drops. But anyways, here's the list: