The air conditioner is broken and the room is humid. When Haruo gets home, he finds his mother, Airi, sleeping in an indecent state. Sweat runs down her voluptuous body. The scent is so lewd that it is enough to drive the young Haruo crazy. In his passion, Haruo attacks Airi. Airi is confused by her son's sudden transformation into a wild beast, but Airi, who is naturally lewd and sensitive, cannot resist the force of her son's hard, erect penis... And the two of them become immersed in a love affair covered in juices.