Ano Oni Kyoushi ga Boku no Ane ni Narun desu ka?
あの鬼教師が僕の姉になるんですか？
A boy is excited to learn he has an older sister after his father remarries a woman with a daughter. His happiness fades when he discovers she is his school's strict PE teacher, Shina. As his father moves in with his new wife, the boy is left to live with Shina. He soon realizes that Shina is very different at home—awkward, afraid of bugs, and gentle.
