Rin, who lives in Yamanashi Prefecture, has harbored romantic feelings for her paternal uncle since childhood. Her uncle, transferred to work in the city, rarely returns home due to his busy schedule, so Rin has coped with the separation by masturbating to comfort herself. One day, overwhelmed by her emotions, she tells her parents she wants to attend her favorite idol's live concert and asks to stay at her uncle's house to save on expenses. Determined, she sets off alone, transferring between local trains to reach her uncle's home in Yamanashi.