Ayase Mafuyu receives her first confession. She is enjoying a happy time with her first boyfriend... but she has a secret that she cannot tell him. Meanwhile, Mafuyu reunites with a senior who once played with her body. He uses her past as an excuse to once again demand her body and Mafuyu obeys... but the guilt she feels is easily overshadowed by the pleasure that was once engraved in her heart. As she reaches the height of her immoral past again and again, she eventually realizes. "I have been like that from the beginning..."