Kodomo heya ojisan refers to middle-aged men who, despite being adults, continue living in their childhood rooms at their parents' home. This work delivers a shocking portrayal of such a man whose mother fulfills his sexual desires, depicting an abnormal daily life. Just as one would naturally brush their teeth or eat meals each day, the mother routinely accepts her son's sexual urges using her own body, making the act seem mundane. With deep emotional bonds between mother and son, this film resonates powerfully with those starved for love.