My childhood friend and her childhood friend are too shuraba (volume 1-7)

Publisher: Square Enix
Author: Shichisuke, Yuu Hiroi
Size: 128mm x 182mm
Number of books: 7
Language: Japanese
Category: Shonen manga, manga
Latest publication date: 2014-04-22

Synopsis:
The best girl at school is my "girlfriend" for some reason!?
Knowing that, Yakimochi, a childhood friend like a younger sister, exploded!? I wanted a mediocre, peaceful, Futu high school life, but why did this happen?