In the warm sunlight of the backyard, mother Kyoka is busy as usual hanging laundry. Her son Tsukasa offers to help and heads to fetch a bucket of water, but suddenly slips and falls, drenching himself completely. As he stands frozen in place, his eyes lock onto his mother's exposed nipples. Embarrassed, Kyoka mutters, "Oh no... my panties are soaked," lifting her skirt to reveal droplets trickling down her thighs. Overcome with desire, Tsukasa loses all rational thought, captivated by his mother's wet body. In that instant, he gives in to impulse and makes a move that will shake Kyoka's heart to its core.