Genkaku Cool na Sensei ga Aheboteochi!
Japanese title: 厳格クールな先生がアヘボテオチ!
Type: OVA
Episodes: 2
Source: Light novel
Genres: Hentai
Studios: Peak Hunt
Producers: Mary Jane
Duration: 17 min per ep
Rating: Rx - Hentai

Hazuki Mizushiro is a very popular teacher in school. One day, student Aoi gets enough courage to write a love letter to her. Much to his enjoyment, she responds to this letter.