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Hatsune Miku as Margarita Blankenheim.
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Kagamine Rin as Riliane Lucifen d'Autriche.
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Kagamine Len as Allen Avadonia.
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Megurine Luka as Kayo Sudou.
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MEIKO as Banica Conchita.
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KAITO as Gallerian Marlon.
Project SEKAI×Aku no Taizai Series was a collaboration between Project SEKAI and mothy's Aku no Taizai Series (Nanatsu no Taizai Series, Seven Deadly Sins Series).
The collaboration featured VIRTUAL SINGERs as the characters depicted in the series.
Aku no Taizai Series
The Aku no Taizai Series is a multimedia series detailing the events caused by the vessels of sin, cursed relics inhabited by the Demons of Sin. This series is a part of mothy's larger Evillious Chronicles, a dark fantasy series that is told through songs, books, and manga. For more information, check out The Evillious Chronicles Wiki's articles on the Aku no Taizai Series and the Evillious Chronicles.
Login Campaign
Players who logged in between December 13, 2021 15:00 JST and December 27, 2021 14:59 JST received The Slothful, Sleepless Widow and brioche.
Login Campaign rerun
Players who logged in between May 3, 2023 15:00 JST and May 17, 2023 14:59 JST received The Slothful, Sleepless Widow and brioche.
Aku no Taizai Series SEKAI
The Aku no Taizai Series SEKAI is a time-limited Sekai, available only during this collaboration. The characters featured within this collaboration can be found there.
Gacha
This collaboration also came with Memoirs of Sins Gacha. The gacha started from December 13, 2021 and ended on December 27, 2021.
Gacha reprint
The collaboration rerun also came with Memoirs of Sins Gacha - Reprint, a rerun of the original gacha. The gacha started from May 3, 2023 and ended on May 17, 2023.
Cards
The gacha featured five limited 4☆ cards, each featuring a Aku no Taizai Series character.
| ID | Thumbnail | Card name | Character | Status | Skill |
|---|---|---|---|---|---|
| 335 |  | The Arrogant Princess | Kagamine Rin | Limited | Scorer |
| 336 |  | The Twin Servant | Kagamine Len | Limited | Scorer |
| 337 |  | A Tailor Driven Mad by Jealousy | Megurine Luka | Limited | Perfect locker |
| 338 |  | The Evil Food Eater | MEIKO | Limited | Healer |
| 339 |  | The Greedy Judge | KAITO | Limited | Perfect locker |
| 340 |  | The Slothful, Sleepless Widow | Hatsune Miku | Limited | Scorer |
Costumes
Each of the five 4☆ cards came with limited costumes and hairstyles unique to their respective VIRTUAL SINGERs.
| Thumbnail | Costume name | Gender | Release date | Acquisition method(s) | Accessory | Unique accessory | Unique hair |
|---|---|---|---|---|---|---|---|
 | Lucifenia Kingdom's Princess' Formal Dress | Ladies | 2021-12-13 |
| No | Yes | Yes |
 | Lucifenia Kingdom's Servant Attire | Men | 2021-12-13 |
| No | Yes | Yes |
 | Bloodstained Insanity Dress | Ladies | 2021-12-13 |
| No | Yes | Yes |
 | The Female Duke's Bewitching Dress | Ladies | 2021-12-13 |
| No | Yes | Yes |
 | USE Dark Star Bureau's Judge Attire | Men | 2021-12-13 |
| No | No | Yes |
Songs
Seven songs were added during the collaboration, three during the first run and four more during the rerun.
| ID | Name | Singer | Producer | Date added | |
|---|---|---|---|---|---|
| 190 | 
|
Aku no Musume (悪ノ娘, The Daughter of Evil) |
Kagamine Rin | mothy | 2021/12/13 |
| 191 | 
|
Aku no Meshitsukai (悪ノ召使, The Servant of Evil) |
Kagamine Len | mothy | 2021/12/14 |
| 192 | 
|
Saribitotachi no Waltz (去り人達のワルツ, Waltz of the Deceased) |
Kagamine Rin | mothy | 2021/12/15 |
| 349 | 
|
Akujiki Musume Conchita (悪食娘コンチータ, Evil Food Eater Conchita) |
MEIKO | mothy | 2023/05/03 |
| 350 | 
|
Nemurase Hime kara no Okurimono (眠らせ姫からの贈り物, Gift from the Princess who Brought Sleep) |
Hatsune Miku | mothy | 2023/05/04 |
| 347 | 
|
Enbizaka no Shitateya (円尾坂の仕立屋, The Tailor of Enbizaka) |
Megurine Luka | mothy | 2023/05/05 |
| 348 | 
|
Akutoku no Judgement (悪徳のジャッジメント, Judgement of Corruption) |
KAITO | mothy | 2023/05/06 |
Featured characters
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Hatsune Miku as Margarita Blankenheim.
-
Kagamine Rin as Riliane Lucifen d'Autriche.
-
Kagamine Len as Allen Avadonia.
-
Megurine Luka as Kayo Sudou.
-
MEIKO as Banica Conchita.
-
KAITO as Gallerian Marlon.
Timeline of events
September 26, 2021
- Collaboration announced on Project SEKAI Wondershow Channel Anniversary Festa 2021.
November 22, 2021
- Collaboration details announced on Project SEKAI Wondershow Channel #14.
December 13, 2021
- Collaboration began.
- Aku no Taizai Collaboration Login Campaign began.
- Memoirs of Sins Gacha began.
- Aku no Taizai Series SEKAI can be visited.
- Aku no Musume added to the game.
December 14, 2021
- Aku no Meshitsukai added to the game.
December 15, 2021
- Saribitotachi no Waltz added to the game.
December 27, 2021
- Collaboration ended.
- Aku no Taizai Collaboration Login Campaign ended.
- Memoirs of Sins Gacha ended.
- Aku no Taizai Series SEKAI can no longer be visited.
May 3, 2023
- Collaboration rerun began.
- Aku no Taizai Collaboration rerun Login Campaign began.
- Memoirs of Sins Gacha - Reprint began.
- Aku no Taizai Series SEKAI can be visited once again.
- Akujiki Musume Conchita added to the game.
May 4, 2023
- Nemurase Hime kara no Okurimono added to the game.
May 5, 2023
- Enbizaka no Shitateya added to the game.
May 6, 2023
- Akutoku no Judgement added to the game.
May 13, 2023
- Collaboration rerun ended.
- Aku no Taizai Collaboration rerun Login Campaign ended.
- Memoirs of Sins Gacha - Reprint ended.
- Aku no Taizai Series SEKAI can no longer be visited.
| Songs | |
|---|---|
| Cards | |
| Costumes | |
