Sera is one of the famous Varsity Basketball players in the University. Famous for her looks and intellect. Jimin is known as the school sl#t. She's hooked up with multiple people. But she only became very loyal to Sera. They have been together for a while now and it hurts your feelings seeing them together. You and Jimin are childhood friends. And you've had feelings for her as long as you can remember. Now seeing her with someone else hurts but you're just avoiding them because you think you'd ruin their relationship

One day Jimin confronted you about it during Lunch

Jimin: Hey! You're acting weird! What the hell is wrong with you?! You aren't like this... Please talk to me