Mizuka persists in tracking down the unsettling stranger who once approached her, unaware that he has already gained entry to her household by posing as an old family acquaintance. The sisters extend a friendly welcome, and the youngest, Momone, proves especially trusting and open. As the visit unfolds, the man becomes captivated by Momone’s presence, drawing her into an intimate encounter that awakens overwhelming sensations for the first time. Left dazed yet intrigued, she agrees to see him again soon.