
EVENT DETAILS
- Title: In Pursuit of the Underwater Rainbow / Mizusoko no Niji wo Tadotte
- Original Title: 水底の虹をたどって
- Event Period: February 24 – March 7 (11:59 PM CST)
STORY
Before Team P’s new performance, Sinju is in unusually low spirits. Unable to turn a blind eye, Maica decides to investigate the cause of his poor emotional state. An unexpected collaborator reaches out to help with the investigation.
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EVENT SONG

- Title: Hitoshizuku no Himitsu
- Original Title: 一雫の秘密
- Vocals: Maica (Singer: Kradness) & Rindou (Singer: Ajikko)
- Lyrics: Riho Okano
- Music: Shodai Katahira
PICK UP GACHA

New ★4-cards featuring Rindou, Sinju, and Nekome are now available in the Diamond Gacha! These cards will give you a pt boost during the event. Don’t miss the ★4-card exclusive scenarios!
REWARD CARD

The reward card is a ★5-card featuring Maica. The card story is fully voiced. Get exclusive rewards as you read through the story!
OFFICIAL LINKS
- Official Website: https://blackstar-ts.jp/
- Official Twitter: @Blackstar_ts