Genkaku Cool na Sensei ga Aheboteochi! 1

A high school student has feelings for his teacher and decides to write her a love letter. The teacher rips the letter into pieces in front of the class, humiliating him. Dejected, the boy visits the student nurse to make some sense of the situation. The nurse tries to console him by giving him some pills, and proceeds to fuck his brains out – as they all do. The teacher walks in on this and shit hits the fan. Potential threesome? Or murder mystery?

Source: hentaihaven.org