One day, Hiro visited his friend's house, but finding no one home, he was invited to stay for dinner by his friend's mother, Rena. Feeling lonely while her husband was away on a work assignment, Rena, already drunk, forcefully stole Hiro's first kiss. After agreeing to spend the night, Hiro, unable to sleep due to the night's events, left his room and accidentally discovered Rena indulging in masturbation out of emotional longing. Mistaking him for her husband due to her intoxication, Rena tightly embraced him, kissed him again, and driven by desire, pushed Hiro down and took things further.