The Demon Prince goes to the Academy

Reading The Demon Prince goes to the Academy manhwa, The Demon Prince goes to the Academy manga with alternative name: 마왕은 학원에 간다 with Description: “I was reading hateful comments about my novel when I suddenly passed away. But, a Grim Reaper appeared and informed me that being a poor writer was a sin. To redeem myself and reach heaven, I had to survive past the ending in one of my own stories. So, I entered the world of ‘The Demon King is Dead.’ “This is just great! Why did this have to happen to me?” To my dismay, the character I inhabited was the Demon Prince, a helpless being with no fighting skills who meets his demise right at the beginning of the story.”