The 22nd reprint of the legendary masturbation work "Virtual Ona" by the genius director Takuto Watanabe. Miki is an instructor for the beginner course at a certain swimming school. She gently teaches you step by step. One day during a lesson, she was wearing a sexy swimsuit with a thong. I couldn't help but dive underwater and stare at her crotch. When the lesson ended and she was about to get up, the student slipped and fell, and Miki lost her balance with him, and she couldn't help but put her hand on his crotch. Even after the student left, she remembered that incident and masturbated while imagining more erotic things.