Saori lived alone for a gravure job, but quit her job and returned to the countryside. Taichi, a younger brother who returned to his parents' house for the first time in a long time, became a virgin man who grew up but was sick of chocolate-in-law. Saori who shows the valley and seduces with the intention of making fun of such an innocent Taichi is overwhelmed by Taichi who has estrus more than expected. From that day, Taichi's unequaled cock, which transformed into a sexual beast, was fucked at home with no escape ...