Mitsuha Higuchi is a swimsuit model, and she decided to go home to visit her parents during her few days off. She also reunited with Satoshi, but he seemed to have something on his mind.
When she asked, she learned that because she is a swimsuit model, he often gets teased by his friends and still doesn't have a girlfriend. In order to teach her younger brother what sex is, Mitsuha Higuchi intended to sit down and explain how to have sex to him, but her body and beauty made him unable to control himself, and he pinned her down, forcing her to 'practice' with him...
