A couple and their male friend at a hot spring inn. If you can have sex next to her boyfriend while the three of them are sleeping side by side, you'll win a prize! Plus, 100,000 yen for every internal ejaculation! Despite inner turmoil, two young people give in to lust and engage in continuous internal ejaculation sex! The thrill of raw insertion and the fear of getting caught leads to great excitement! Four scenes of summer night adultery recorded.
