Demon King, Age 18

Lavis Vindica, son of the Demon King Gamudair, was exiled for a bloodbath that shook the Demon Realm. After being sentenced to inhabit the frail body of Jung Minho, a human teen left comatose by a pack of school bullies, Lavis is fueled by rage and desperate to find a way home. But he quickly discovers a chilling truth... The mortal realm is infested with evils far more sadistic than anything he’s ever seen. Now, he must survive a world where the real monsters hide in plain sight.

(Source: Tapas)