The secret between me and her is trivial yet important.

Hajime Takahashi, enrolled in Shuubi High School solely because it's the sacred place of his favorite manga. Everywhere in the school are locations that appeared in the manga, and he's super excited! Amidst this excitement, Takahashi meets a beautiful girl, Yayoi Kurokawa, who looks just like the heroine from his favorite work, and they come to share a certain secret.