Reiko married a divorced man and started living with his stepchild Atsushi. Reiko was devoted to doing housework and trying to build a happy family. One day, she encounters an astonishing event that Reiko thinks something is wrong. Atsushi's crotch is surprisingly swollen while relaxing in the living room, and isn't he casually messing around with it? Reiko lost herself in a bulge that is incomparable to her husband.
