i'm living alone as an unremarkable single salaryman. sumire-san, a woman who lives in the same apartment, is a very beautiful and cheerful single mother, and every time we pass each other and greet each other, she encouraged me with a bright smile. one day, i helped sumire-san with the delivery work for her women's association, and i was humbly allowed to go to her house and was treated to tea and sweets, but then an unexpected development occurred...! *the recorded content may vary depending on the distribution method.