Makemasen kara to Iiharu Kao no Ii Onnanoko wo, Zenryoku de Kuppuku Saseru Yuri no Ohanashi

Kureha Sara is the reigning "Super Onee-sama" of an elite ladies' academy, a position she's earned through nothing but relentless effort. Her status is suddenly challenged by Mareshino Rui, an effortlessly perfect beauty who proposes a secret contest to determine who is truly fit to get on top. With the school-wide popularity poll just two months away, they need a way to settle the score, just the two of them. Rui's method is... quite unexpected.