Xam'd: Lost Memories

Akiyuki is having an usual day, as he is almost late for the bus to his school, then he helps some girl to get on the bus, which turns out to be a mistake, the girl causes an explosion and in that commotion Akiyuki transforms into a creature by the name of Xma'd. He cannot control himself and goes on a rampage, until a mysterious red-haired girl stops him and takes him with her to a ship.