Yuka, forgetting that her son's friend Tatsuya was staying over, wandered around in just a bath towel as usual after taking a bath. Tatsuya, unable to contain his excitement, approached her and sought her body. Although she managed to refuse penetration, Tatsuya stayed at the Masayama house again a few days later… He told her clueless son, "Do you know that Auntie is cheating because she's horny?" She hurriedly sent her son away and gave in to Tatsuya to protect her family.
