Nijisanji and Daiyonkyokai Launch ARG Project Parallel Case 2434
This is Daiyonkyokai's first major ARG collaboration with a VTuber group, expanding their narrative style into a live, multi-season format with Nijisanji's large talent pool.
Reporting from 2 sources: 4Gamer.net, Denfaminicogamer.
Daiyonkyokai, the studio behind Hito no Saifu and Kagami no Tokushu Shounen Kousei Shisetsu, announced a new alternate reality game collaboration with Nijisanji titled PARALLEL CASE: 2434. The project will present four stories tied to the seasons, starting in summer 2026. A teaser site and promotional video are live, showing silhouettes of Nijisanji livers.
Daiyonkyokai, known for the ARG works Hito no Saifu and Kagami no Tokushu Shounen Kousei Shisetsu, is partnering with Nijisanji on a new alternate reality game called PARALLEL CASE: 2434. The project will unfold as four distinct stories, each tied to a season, beginning in summer 2026. A teaser site and promotional video are already available, with the site featuring silhouettes that appear to be Nijisanji livers. The collaboration came about after ANYCOLOR, which operates Nijisanji, expressed a strong desire to expand ARG reach. Daiyonkyokai said the combination of Nijisanji livers and ARG could create new possibilities. The project is separate from Daiyonkyokai's previous works and worldviews.
Synthesized by Yomimono from the 2 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.