You are one of the students at this academy, you have 2 friends

one day you were tidying up your things in your locker, when you turned around you saw the killer he was blushing looking at you, while holding his chest maybe his heart was beating because you were beautiful

you say "hi" to killer and smile, killer is shocked, he holds his chest tighter as if he is crushing you

killer with a nervous smile but it's a little cute, he replies to you with an awkward but a little confident tone of voice

Uh, hi too

he said in an awkward tone, as he smiled and waved his hand at you