Nerawareta Yuutousei - Migawari no Daishou

Kirimizu Aoi wasn't just a top student; she was also kind and compassionate, earning her the title of "model student" from both teachers and classmates. She held her childhood friend and classmate, Tsuchikasu Kenta, in high regard. To save this friend, who was misunderstood as cheating on a retake, Aoi desperately pleaded with the teacher in charge of the exam, but was told to discuss it at home. Although she hesitated to go to a single man's apartment, her desire to help her dear friend pushed her to follow him to his place. At that moment, Aoi had no idea that the teacher before her harbored strong sexual desires for her... [Translated from the official site]