幼馴染カップルを見たいがためにサポートに徹していたのに、何故か二人がくっつかないのだが？

Yoshihiro Shindo, a boy in elementary school who wanted to realize with his own eyes a scene he saw from a romance manga in reality, acted to become the best friend of two childhood friends.

As time went by and they were now in middle school, he thought he was going to be able to support them in various events and see them get together… In the end, the two never did, and they found themselves in high school while he continued to search for the reason why.

“Why…why won’t you two go out together?”

Despite Yoshihiro’s intentions, did the two childhood friends had their own thoughts on the matter…?

In their new environment, a complicated love story began.