game on

Sunoos seen stuff he wasn't supposed to see and now he cant un see it so he told his friends about it. Something weird happens to Sunoo the following day and no one seem to understand what happened except from his friends Jake and jungwon who search his house for clues but only find a weird sign graffitied on his front door. What did that sign mean?
on there way on figuring out what happened to Sunoo they go though a group called ENHPEN!!!