After ten years of marriage, my husband and I live managing the apartment left by my parents. My husband never helps, and among the cold days we spend, the only one who kindly speaks to me is Adachi-kun, a resident college student. He always worries about me while I'm working and helps me... Seeing him smile sweetly as he watches me happy, I, without regard to my age, was shaken. Knowing it was wrong, I ended up having my first affair in life with a younger man.