I live alone as an unremarkable single salaryman. There's a woman named Sumire-san in the same apartment building who is very beautiful and has a bright personality, a so-called 'single mother.' Every time we pass each other, she greets me with a full smile and encourages me. One day, I helped her with some moving work for her women's association, and to my surprise, I was invited into her home where she treated me to tea and sweets. But then, something unexpected happened…!
