When Arisa discovers her son masturbating, she becomes aroused by his rock-hard erect cock. Even under the covers, she can't stop thinking about her son's crotch and instinctively starts masturbating herself. Hearing moans leaking from his mother's bedroom, the son notices Arisa masturbating and catches her in the act, drawing them closer together. Overcome with guilt over their incestuous relationship, Arisa refuses to have sex a second time, but the son pressures her saying, "This way is okay, right?" as he pushes for anal sex. Their conflicting emotions only deepen the complexity of their forbidden bond.