Anna Koshiro is childhood friends with Sou Nagase and Hinata Tokura, the most popular boys in school, and because of this, everyone assumes that she will date either of them eventually.

[4] The chapters were later released in 11 bound volumes by Shueisha under the Ribon Mascot Comics imprint.

[1] During the series' run, a vomic (voice comic) was released on Shueisha's website on May 13, 2011, which adapted the first chapter.

[5][2] The vomic was also later released as a magazine gift on DVD with the June 2012 issue of Ribon on May 1, 2012.

[6] After the series' run, Haruta published another spin-off side story titled Sekai de Ichiban Semai Hoshi (世界で1番せまい星) in the 2013 Winter Daizōkan edition of Ribon Special, which focused on Mashiro and Rin, and was later published in volume 1 of Tsubasa to Hotaru.