IPZZ-370 Mitsuri Nagahama, a busty gravure idol across the hall, seduces with her revealing swimsuit. Her hip movements cause repeated ejaculations.

Mitsuri Nagahama, a gravure idol the narrator admires, lives opposite. She notices him watching and teases with her swimsuit and bouncy boobs, leading to sex. Her lewd hip movements make him ejaculate many times.