Futanari Joshi Kousei wa Ryoubo-san to...

A high school girl with a unique physical condition moves into a dormitory, where she encounters the dorm mother. The dorm mother is an older woman who becomes aware of the girl's situation and takes an interest in her. Their interactions begin with curiosity and gradually develop into a more intimate relationship.

The girl struggles with her own desires and the unusual dynamic between them. As they spend more time together, the boundaries between caretaker and resident blur, leading to a series of private encounters that explore their hidden feelings and physical connections.