The King of the Dead at the Dark Palace, Vol. 1 (light novel‪)‬

THE BEGINNING OF END When a sickly boy succumbs t illness only to awaken as a lowly undead named End, his initial reaction is not horror but joy. No longer weak and bedridden, he is eager to experience the freedom of a properly functioning body. Sadly, his delight is cut short when he realizes the shackles of his previous life have simply been replaced by new ones-specifically, the powerful necromancer who revived him. To gain true freedom, he’ll need to overcome the many obstacles in his way...starting with his dark master!