宵の鳥 (Yoi no Tori, "Evening Bird") is an original maimai song by composer n.k featuring vocalist 影縫英 (Hana Kagenui). It debuted in maimai でらっくす FESTiVAL PLUS on June 22, 2023, as part of the Sky Street Area 4 unlockable content. The track runs at 145 BPM and sits in the maimai (original) genre category. The song was produced with a full creative team: n.k handled composition, arrangement, and lyrics; Satoru Shirasuka contributed guitar; and the music video was directed by the duo Roly / bikku. The MV itself is a visual narrative piece that accompanies the song's lyrical themes of longing, loss, and memory, echoed in the Japanese lyrics that speak of returning flowers, fading flames, and a world without a loved one. Additional context comes from the extensive flavour text (フレーバーテキスト) associated with the song, which tells a standalone story set in a fictional world: the Akatsuki (暁) family, whose political authority derives from oracles delivered by the Yatagarasu (a divine three-legged crow). The narrative follows a young heir who, after secretly performing a forbidden dance for his childhood friend Kohaku, begins to genuinely connect with the sacred rites, only to receive a devastating oracle at his coming-of-age ceremony foretelling Kohaku's death. The song's lyrics and mood tie closely into this tragic arc, with imagery of scattered petals, twilight, and a door to the future.