I'm living alone as a dull single Lehman. A woman named Sumire, a so-called "single mother" who lives in the same apartment and has a very beautiful and cheerful personality, encouraged me with a cheerful smile every time I passed by and greeted her. One day, I helped Sumire's women's association carry in, and I was afraid to go up to her home and feast on tea and sweets, but there I didn't expect it ...!