Many things start to change at Sehun's highschool as soon as a new female student transfers there.

She never introduces herself clearly to anyone.

She's very strange from the others students which made Sehun very suspicious of what her identity is.
It also seems that she has many secrets that she kept hidden well.
She is also secretly hiding from a very dangerous person who killed her parents.
Is it too obvious for Sehun that she is not a normal person?
She's a really mysterious person.