Ogami-san Can't Keep It In manga volume 3 features story and art by Yu Yoshidamaru.

Ogami-san and Yaginuma-kun are officially a couple! But instead of things being all sunshine and roses, the couple finds themselves swept up in a storm of confusion as to how “dating” actually works. To make matters worse, the seeds of a love triangle take root when Yaginuma-kun's middle school classmate Tago-kun starts making moves on Ogami-san. There's got to be a way out of this, right?!