This year, the Japanese archipelago experienced record-breaking warm winters. Ryukou returned to his hometown during winter break. Unlike previous years when it was cold enough to shiver, this year was completely different. His father and stepmother Aina lived at home, but upon returning, he found Aina had already put away her autumn clothes and was cleaning the room in a brand-new winter knit sweater, sweating... Her breasts were pushed out by the tight knit, with sweat on her armpits and neck... Seeing his stepmother like this, Ryukou could no longer suppress his feelings...
