Osananajimi no Yamabuki-san

is a Japanese light novel series written by Michikusa Yomogi, with illustrations by Peko. The series began publication on October 7, 2017 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Hey, Akari-chan. I'm going to get angry."

That was a promise I made with my childhood friend, Akari Yamabuki, when I was little. However, nowadays, I'm sure only Kiichiro Aoba can remember the promise.

Time passed, and the two became estranged from nature and became high school students.

Unlike the sober Kiichiro, Akari became an undisputed beauty, 　but her existence gradually disappeared due to the sudden "curse of youth

" that "you will receive a curse from now on."

It will be done !?

In order to save her, you have to do a lot of youth (trials) !? It's time for the two of them to start moving again. A youth romantic comedy in which boys and girls run their best in high school life, which is only once.