Na Ae Joon dreams of his idol Choi Si Yeol acting sweet and romantic toward him, only to wake up flustered and embarrassed. By day, Ae Joon is a hardworking high school Korean teacher; by night, he is a devoted fan of A-One’s Choi Si Yeol. But when a variety show filming unexpectedly brings Si Yeol to his school, he shocks everyone by personally choosing Ae Joon as his partner.

On the first day of filming at school, Choi Si Yeol openly shows his affection, boldly declaring that the teacher is his ideal type, leaving Na Ae Joon flustered. As they film the campus tour, sparks of romance begin to fly, while Ae Joon grows increasingly anxious that his secret life as a devoted fan might be exposed…

After exchanging contact information with Si Yeol, Ae Joon struggles with inner conflict, unsure how to take a step closer to his idol. Meanwhile, Si Yeol teaches in the classroom as a trainee teacher, showing a professional charm different from his stage persona – drawing Ae Joon even deeper into his feelings for him.

Si Yeol confesses that he has liked Ae Joon from the first time they met and asks to keep in touch. He then invites Ae Joon to dinner, showing his thoughtful side from ordering to paying the bill, before making an even more intimate request.

.

.

.

.