Reina had long been aware of Kouta, her son's friend, as a man. Her feelings steadily grew until one day, she could no longer suppress her desire. Putting on her most daring lingerie—the special outfit she reserved for crucial moments—she prepared to seduce him. Her plan succeeded, and as an initial test, she passionately gave him a blowjob, finally extracting the semen she craved. However, overwhelmed by awkwardness, Kouta abruptly fled the house—leaving his cellphone behind without realizing it.