Kokoro Button
Kokoro Button is a Japanese shōjo manga series written and illustrated by Maki Usami. It was serialized in Shogakukan's Betsucomi magazine from the June 2009 issue to the December 2013 issue. Shogakukan collected the individual chapters into 12 bound volumes under the Flower Comics imprint; the first volume was released on October 26, 2009, and the last volume was released on April 25, 2014. The series is licensed in France by Soleil Manga and in Germany by Egmont Manga & Anime.
In 2016, the Japanese video distribution service dTV adapted Kokoro Button into a "movie comic", a series of videos containing animated panels from the manga with music and voice acting. The roles of Niina Kasuga and Eito Koga were played by Yoshino Aoyama and Shunichi Toki, respectively.