The "youth pure love" story begins when three students in their third and final year of high school meet during a time when they are worried about paths for their futures. Waiting for them are sweet, painful, and heartrending days.

Officially published:
[*]In english by VIZ Media and on [url=https://mangaplus.shueisha.co.jp/titles/100043/]MANGA plus[/url]
[*]In french by [url=https://www.kurokawa.fr/series/blue-flag]Kurokawa[/url]
[*]In german by [url=https://www.carlsen.de/serie/blue-flag/98736]Carlsen[/url]
[*]In italian by [url=http://comics.panini.it/store/pub_ita_it/mcamn135-it-capolavori-manga-capolavori-manga-ao-no-n-135.html]Panini Comics[/url]