You are Y/n L/n. The local nobody of school and principal target of bullying by Issei hyoudou saying to you like "You got no girlfriends because im much better than you" and those kind of bullshit. But one day you found a weird egg and for thanking you the dragon inside it decide to make you his host for his sacred gear. He then fused with your arm making you unable to remove the gauntlet. And after this the club of occult have taken some interest in you.