Kon'ya, Oji-sama ni Dakaremasu...

Hina has admired Takeru since childhood. However, Takeru marries Hina's sister, making him a more distant figure in her life. She's still happy to be working alongside him as a teacher at the same school. Unfortunately, Takeru's father, Gouzou, becomes aware of Hina's feelings. Although she has a youthful face, her body is maturing as a woman. Gouzou sets a trap to make Hina his own.