Torikago no Naka no Kimi

Souma is a high-achieving student who was left by his mother as a child and raised by his aunt and uncle. Though their family is affluent, they show little care for him—his uncle is indifferent, and his aunt resents having to look after him. The only family member who truly values Souma is his cousin Sakuya, who becomes a significant presence in his life. After 12 years, Sakuya discovers Souma’s intention to become self-reliant and seizes control of his body against his will.