I Love Amy manhwa volume 1 features story and art by UNNI.

Bibi loves Peter. And Peter would love Bibi... if not for that pesky girl Peter was talking to in the school hallway! Bibi needs her out of the way, so she invites her new rival over for 'a sleepover'. But instead of making sure the girl from the halls won't get in her way any further, Bibi enjoys a pleasant night with her new friend, Amy. As they fall asleep, Bibi wrestles with an unfamiliar and confusing feeling. Something must be wrong, because Bibi loves Peter... right?