Firefly does housework in an ordinary house. A young man who appeared there was disproportionately young to Hotaru. They were an unbalanced couple with an age gap of about 30 years, but they were close enough to envy those around them. However, Hotaru does not allow her boyfriend to do anything more than kiss, and that makes him spend days in frustration. One day, when the young man visits Hotaru's house, he sees him with someone...
