Under the simple rule of "spend the whole night with a beautiful woman with an I-cup perfect body until the sun rises," she spends a secret night in a city hotel in Tokyo with an Amateur man selected from a large number of online applicants. Yuri Oshikawa herself had thought "I'll just enjoy it three times...", but she was surprised at first by the man's truly insatiable cock, which didn't go limp even after ejaculating more than she expected. However, she felt the joy of being a woman, and they both became excited as they orgasmed multiple times...