Crushology 101

When Bunny was going to take a leave of absence, she bumped into a good-looking guy.

Bunny decides to work part-time at an exhibition, and she runs into another handsome guy.

Seeing Hee Jin getting closer with other guys, Jae Yeol just can't sit back and is worried.

Hee Jin finds it hard to open her heart again.

Jae Yeol confesses his feelings to Hee Jin. Meanwhile, Yeo Reum comes to school.

Hee Jin finally admits her feelings for Jae Yeol. However, Yeo Reum becomes an obstacle.

Misunderstandings brew as Hee Jin, Jae Yeol, Ji Won, and Yeo Reum prepare for the school festival.

The feelings that were left unsaid are revealed, prompting Hee Jin and Jae Yeol to change.

Personal crises push Bani closer to Ji Won just as her relationship with Yeol faces its first test.

Hee Jin applies for a scholarship program in the US, and Jae Yeol has mixed feelings.

A series of unexpected encounters takes place after Hee Jin's return.

Hee Jin is confused between Jae Yeol and Hyun Oh. Jae Yeol finds a chance to confess his feelings.