Ichika, who likes to help others and wants to do a job that makes people happy, is sent to the Ashida family home for a two-day, one-night part-time job as a housekeeping service. The clients, the Ashida couple, are away from home. The Ashida brothers, who are shut-ins and in the midst of puberty, take advantage of Ichika's position as their son and play with his body as if it were a game... "At first I thought it was just a simple prank, but..." Ichika falls into a hell of orgasms as the shut-in boys' escalating pranks lead to a series of sexual acts...