Midori (50), a mother, once let her son Takashi release his pent-up desires in order to get him to concentrate on his exam studies... Recently, her son, who can't get a girlfriend, has begun to desire his mother again, and Midori has no choice but to comply, but her son's classmate Nakata finds out about it. Wanting to keep the secret between mother and son, Midori has no choice but to do as Nakata says...