My Mai: Koakuma na A Cup - Season 1

A daily ritual unfolds in the Utsumi household as Miyu berates her step-brother, Mitsuru. His relationship with his step-sister remains strained, a source of distress for him. In their parents' company, Miyu exhibits angelic behavior, but in private, she reveals a devilish nature. Mitsuru learns of Miyu's complex about her small bust size and foolishly mentions it, provoking her fury. During a struggle to restrain her, they tumble to the ground. With Miyu's face now close to his, Mitsuru feels drawn to her cute features, the warmth of her body, and her distinct feminine scent.