Tsukiha-chan, who lives in Hakone, has secretly been in love with her father's uncle since she was a child. Her uncle, who lives in the city, is busy with work and hasn't returned home for a long time, but even while they couldn't meet, she continued to think about her uncle. One day, unable to suppress such a fleeting love, she told her parents that her favorite singer's live concert would be held in the area where her uncle lives, and that she would stay at her uncle's house because it would be a waste of accommodation costs, and came to her uncle's house in the city...