Reo works as a swimming instructor and personal trainer at a gym, where she is also dating her former classmate and coworker Hashimoto. Her career and love life are thriving, but Iida, a coworker who wanted her, grows bitter and resentful. One day, while Hashimoto films a promotional video, Iida supports Reo in the pool and begins touching far more of her voluptuous body than necessary. The molestation escalates into an assault inside the gym that forces her to climax, turning the shoot into an NTR nightmare.