The Japanese archipelago experienced a record warm winter this year. Takayuki returns to his parents' house during winter break. Usually it's so cold that it makes you shiver, but this year is completely different. Aishichi's father and mother-in-law lived in the house, but when she returned home, Aishichi put away her fall clothes early and cleaned the room with the sweat on her winter cardigan. Stick your chest out of your tight knit shirt and sweat in your armpits and neck. Looking at his mother-in-law like that, Takayuki couldn't control his emotions.