第1話: 2030年7月1日、困難な27歳の誕生日を迎える漫画編集者の西野瑞穂は、過去の自分を振り返る。

July 1st, 2030. Manga editor Nishino Mizuho is having the worst 27th birthday ever. The manga she’s in charge of will be ending. However, when she sees a group of high school students having fun, she recalls her own adolescence. 10 years ago, during her second year of high school, Mizuho had four childhood friends who she grew up with in a residential neighborhood known as Koigahama Highlands… (Source: Crunchyroll)

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