Mitsuha Higuchi is a swimsuit model. She had a few days off so she decided to go home to visit her parents. She also met Satoshi again, but he seemed to have something on his mind.

She asked and found out that because she was a swimsuit model, he was often teased by his friends and until now he still didn't have a girlfriend. In order to let her younger brother know what sex was, Mitsuha Higuchi intended to sit down and tell him how to make love, but Higuchi's body and beauty made him unable to control himself. He pinned her down and forced her to "practice" with him...