Story
OVA by Anime Antenna Iinkai — Summer 2009, 3 episodes, Finished.
Based on the erotic game by Bishop. Takuya's parents divorced when he was a child. His mother took him and she got married to another man, Sanada, soon. Sanada's son, Eiji, was a genius and looked down on Takuya. Takuya couldn't stand it anymore and left his house. He entered a high school with his mother's family name. One day, there comes a new teacher to his school. It is Eiji, his older brother. Accidentally, Takuya sees Eiji and Miyuki, a popular female teacher, meet secretly in a vacant classroom.
Synopsis via AniList (English).
