Though I May Be the villain, I Just Want to Live Peacefully

Yunho had always been a sickly kid, and at the ripe, young age of 19, he died of a terminal illness. But just when it was all over, morning comes again?! And now he's the villainous younger brother from the novel he'd been reading! His reincarnation would be seen as a curse by many because of his character's destiny of banishment and misfortune, but Yunho is determined to turn it into a blessing in order to finally live a healthy life.
"I just want to live peacefully!"