[5] Souta Hatate, a new transfer student to the Hatagaya School, has the ability to see the futures of those around him in the form of flags.

5] If Her Flag Breaks began as a light novel series written by Tōka Takei, with illustrations by Cuteg.

[9] A manga adaptation illustrated by Nagian began serialization in the December 2011 issue of Kodansha's Monthly Shōnen Rival magazine, published on November 4, 2011.

[24][25] A second series, titled Atarashii Kanojo ga Flag o Oraretara (新しい彼女がフラグをおられたら), was serialized in Monthly Shōnen Sirius from April 25, 2015 to February 26, 2016.

[5] The opening theme song is "Cupid Review (クピドゥレビュー) by Aoi Yūki, while the ending theme song is "Kanojo ga Flag o Tateru Wake" (彼女がフラグを立てる理由) by Yell, a group composed of Ibuki Kido, Ai Kayano, Kana Asumi, Kana Hanazawa, Yōko Hikasa and Ayaka Suwa.

She criticized the overuse of pastel coloring, the female characters having either generic designs or annoying personality traits and felt the ending was rushed.