However, Jung-hee has a crush on Son Jin, a cute looking senior student of a boys school, and begins to follow him around to attract his attention.

One day, Park Hye-joo, a transfer student from Seoul, joins their class and becomes the center of attention, creating jealousy and friction among the heroine and her friends.

However, Hye-joo has no romantic feelings for Son Jin, as she is interested in Joo Young-choon, an ex-gangster now turned local handyman.

There is also a darker side to the story, with a mystery surrounding an increasing number of sexual assaults in the city.

The first script reading meeting of the cast was held on August 18, 2017, at KBS Annex Building in Yeouido, Seoul.