Fansite master Yerin wins a raffle to go on a dinner date with her bias, GFriend’s SinB (aka, SinB is a flirt and Yerin is a mess).

Student council president Yuju has been crushing on class secretary Umji during the school year. It's already the last day of school and Yuju still can't find the courage to confess her feelings. To her surprise, Umji makes the first move.

It's SinB's birthday, and Yerin takes it upon herself to make it the best one yet.

SinB finds herself smitten with Yerin wearing glasses at a fansign event.