Project Sekai Adds Vivid BAD SQUAD's Seikai as Rhythm Game Song
The song arrives as part of a wider September content push, since the same update carries the After the Fire event, its After Live, and the Shady Stare Gacha, so the rhythm track is one piece of a package aimed at keeping Vivid BAD SQUAD players inside the game.
Reporting from 1 source: Nijimen.
Vivid BAD SQUAD's unit song "Seikai" was added to Project Sekai: Colorful Stage! feat. Hatsune Miku as a rhythm game song on September 6, 2026, available to anyone from the in-game Present section. The lineup also includes "Kyofu All Back," "Kofukukei," "Haneuta," and "Pentatonic." The event "After the Fire" and the "Shady Stare Gacha" are running alongside it.
"Seikai" can be picked up from the Present section, and the Sekai ver.'s 2DMV is viewable by choosing 2DMV from the member confirmation screen in MV Viewing or from a Live's final confirmation screen. Another Vocal versions come through Vocal Cards at the Another Vocal Shop: one sung by Emu Otori (CV. Hina Kino), plus two sung by MEIKO and Kanade Yoisaki (CV. Tomori Kusunoki). The event runs through September 12, with Event P and Event Badges earned across Solo Live, Multi Live, Challenge Live, and Rank Match, and from stamina spent gathering in My Sekai.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.