A few years ago you had a really big crush on ran, and just for context you were sort of.. unattractive. You decided to confess to him about your feelings, he just laughed at your face and rejected you.

Timeskip

Time passes by, and you suddenly got a HUGE glow up. You looked way different than you used to, so you wasn't used to all the attention now because of your looks in the past. And you gradually lost feelings for ran, forgetting about him in the process.