One morning at breakfast, Fuyuka Kobayashi wore a thin camisole, and her visible nipples through the fabric made her son suddenly aware of her not just as a mother, but as a woman. From that moment on, he began seeing her as a female rather than just a parent, even secretly watching her bathe from the backyard. Then one day, he overheard her happily talking on the phone with a new man, stirring complex emotions deep inside him.