When her daughter and son-in-law return home for the first time in a while, the reunion takes an unexpectedly thrilling turn. As they chat and laugh together, Rin accidentally spills some snacks and quickly ducks beneath the table to clean up. In that brief moment, her eyes catch a glimpse of her son-in-law's crotch, leaving her unable to shake the image from her mind. Though visibly flustered, she returns to her seat, and the atmosphere gradually shifts into something tense and charged with excitement.