Princess 69: Midnight Gymnastics Ep - Season 1

Based on a game by Panda House. Dark rhythmic gymnastics exists as a secret competition. Its entrants enhance their beauty and lewdness through techniques more demanding than standard rhythmic gymnastics. Haneoka Fubuki is searching for his missing older sister-in-law, Haneoka Miku. During his search, he locates her at the residence of Tomomi, who is Miku's classmate. According to Tomomi, Miku has become ensnared in the sinister aspect of dark rhythmic gymnastics. To secure her freedom, Fubuki makes a firm decision to train as a coach for this discipline. Pursuing this goal brings him into proximity with Fujimiya Koyuki, a girl selected by Tomomi, though he remains unaware of the destiny that awaits him.