Double Taisei v01-v03 (2020)

English translation of the Japanese manga Futari no Taisei (ふたりの太星).
Genius shogi player, Taisei Tendo has a split personality. He is the well-behaved "Tai" during the day, but turns into the freewheeling "Sei" during the night. Tai is about to participate in the professional qualifying tournament for shogi, but his world is suddenly turned upside-down when he switches places with Sei!