Ichika, who is a caring person and wants to do work that makes people happy, is sent to the Ashida family for two days and one night as part-time worker for a housekeeping service. - The clients, Mr. and Mrs. Ashida, are away from home. - The Ashida brothers, who are reclusive and in the midst of adolescence, take advantage of their son's position and play with Ichika's body as if it were a game... ``At first I thought it was just a harmless prank, but...'' Ichika retreats. - A reclusive boy's escalating series of fornication called pranks and the descent into acme hell...