Young wife Anna is unsatisfied with sex only with her husband, so she starts an affair with a male coworker whenever her husband is away. Inviting him on a hot spring trip, she stays overnight and passionately gropes his huge breasts, her desire escalating as she repeatedly gives him blowjobs and titty fucks. He's into cosplay and makes Anna wear a school swimsuit, which perfectly fits her voluptuous body, driving his excitement to the peak. Unable to hold back any longer, he invites her to bed in the middle of the night, culminating in her massive breasts becoming soaked with his cum.