Don't get me wrong, I'm worse...

Character introduction

Kim Min-ju, who appears to be a good person but is actually a very bad vampire... goes to Saeyang Middle School.

Kim Chae-won, seems like a nice person. People think she's a worse vampire than Min-ju, but in fact, Min-ju is worse. She went to Sae-wook Middle School.

Jang Won-young, a god to vampires. She seems very kind, but in reality, she is worse than Min-ju. The principal of Sa-Ae-Jeong Middle School.

Eunbi Kwon, I don't believe in vampires. I'm human. I went to Saeul's Middle School.

What will happen in the future between Saeyoung, a middle school vampire, and a person?