Over a decade after last visiting his relatives, Naoki returns to the Omine household. The aunt he hadn't seen in years remains as youthful as ever, exuding a subtly seductive charm. That night, heading to the kitchen for a drink of water, Naoki stumbles upon an unexpected sight—his aunt deeply engrossed in masturbation. Shocked by the scene, the image burns into his mind, refusing to fade. From that moment on, fantasies about his lustful aunt spiral through Naoki's thoughts, gradually blurring into reality. Unable to satisfy himself with mere fantasy, he begins taking bold steps toward turning his desires into truth.