Hinata was living a happy life after marrying her childhood friend, Ogaki Itsuki, but she had a past that she could not tell her husband about. Hinata attended a class reunion to settle that past. As Hinata enjoyed reuniting with her old friends, her eyes fell on Sawaki, a teacher. He was popular as a reliable teacher who listened carefully to his students. But to Hinata, he was the one who took her virginity and taught her many things. Hinata wanted Sawaki to apologize for the past, but when she was in front of him, she could not find the words to say. Instead, memories of the past came back to her, and Hinata’s body began to ache.