Koi no Zetsubou Koushinkyoku

Overview

"Hey, wanna try going out with me?" Rei has feelings for Ami, a girl in her class who's always been kind to her. So when she confesses to Ami, she fully expects to get turned down... until Ami says she likes her back! But now that they're officially a couple, Ami seems a little off. While Rei is head over heels for her, Ami is a player who isn't even sure how to love just one person. Rei is crushed by Ami's seemingly careless approach to their relationship, but even so, she won't give up. Will Rei's earnest but cumbersome feelings for Ami win out in the end? Or is the girl she loves simply too far out of reach? (Source: Yen Press)

Source: AniList