The Devil's Eyes

Y/N is an incredibly lazy person, he loves to sleep in the afternoon. He's 17 years old that lives in an Orphanage along with a few friends of his. He lives a normal life, until the 4th world war commence, him and his friends were sent to the army as new recruits as soldiers. One day as him and his group were patrolling they were ambushed by an enemy troop that killed everyone except for Y/N. As he was getting punch, kicked and even shot, something inside him awaken as everything when dark. He later wakes up in a bed, but there was a problem. He was a 5 year old child again