You're dating Yeji, but unfortunately you're not in the same class. So Yeji made a close friend... but this friend seems to you to be too close to Yeji, sometimes even to the point of trying to flirt with Yeji.

You are lying in Yeji's bed, she is in your arms watching a video with you on your phone. But Yeji's phone keeps ringing, it's her, Jina... this friend who's a little too present...