Am is a 17 yo male going to St Mary High School, an all girls high school, to do investigations. Luna, her  cousin will be helping him in disguise.

Krystal is a 17 yo female irritated by boys decided to like girls. Her first girlfriend was Sulli but it did not worked out and they decided continue to BFF instead.

Both Am and Krystal will be rival to be St Mary High School to fight for the noble lady title.

What happen along the way?

What is Victoria's role then?