Project SEKAI premieres “正解” Full ver. by Vivid BAD SQUAD × Kagamine Rin

Crypton Future Media’s official Hatsune Miku account retweeted Project SEKAI’s announcement that the full version of “正解” (Seikai) by Vivid BAD SQUAD × Kagamine Rin would premiere on YouTube. The premiere started at 21:15 JST on Saturday, September 12, 2026. The official video is available at https://youtu.be/OCxYaeev9rQ (YouTube title: 正解 / Vivid BAD SQUAD × 鏡音リン). The track is a Project SEKAI Colorful Stage! feat. Hatsune Miku unit song featuring Vivid BAD SQUAD with Kagamine Rin. Crypton Future Media’s official X account shared the premiere so fans of Piapro Characters could watch the full cut as it went live. Source: official X post by @cfm_miku (retweet of @pj_sekai), September 12, 2026.