Tatsuya left home to attend school and, for the first time in a while, returns to his hometown. Having lost his parents in an accident, he visits his hometown to pay respects at their grave. His senior, Yusuke, suggests he stay overnight at his house. Tatsuya has long harbored quiet feelings for Yusuke's mother, Shiori. Unable to sleep, he begins masturbating to ease his tension, but Shiori catches him in the act. Slightly drunk, Shiori doesn't react with embarrassment—instead, she eagerly pleads, "Show me more." Before long, she says, "Shall I help you?" and reaches her hand down toward Tatsuya's crotch...