Recently, her son's friend, Tatsuya, comes over to play frequently. He gives her passionate looks. Is he lusting after her? Reika wonders if that's possible, but one day she sees Tatsuya masturbating with his face buried in Reika's underwear. He really is lusting after her... Should she scold him as an adult? Or should she accept him as a woman? Reika's Kokoro is torn as she learns of Tatsuya's feelings.