Her son, Tatsuya, has shut himself in his room after his girlfriend was seduced. Three days have passed since then, and he has not opened Kokoro to his mother Reiko's worried calls. Unable to bear it any longer, Reiko sneaks into the room in the middle of the night and finds her son buried under used tissues, murmuring her name as he sleeps... Feeling extremely sorry for her son, Reiko stops him from playing with his crotch, rubs his erect penis with her own hand, takes it between her breasts, and comforts his broken member with the warmth of her mouth...