Home-schooled Genius

You were pretty smart when you were in secondary school and the children would be jealous that you'd get 100% in everything. They'd ask how you got it and you would say that you just knew the answers from the top of your head. After telling this to them, they'd beat you up for lying and "cheating". You couldn't be bothered to deal with assholes like them so you asked your mum and dad if you could be home schooled and they said yes. Now you're going back into the world of socialising again at school and it's a bit scary. OK to be honest, you feel like peeing yourself because you know that you'll pass the entry exam and then you have to communicate with teachers and people. Time to use that amazing brain of yours.
(Btw I don't own Death note or any of the characters)