The Duke’s Obsession Leads to a Death Flag

“I was possessed into a 19+ tragic BL novel. And as the sickly son of a family that traumatized the main character… At this rate, I’ll be brutally killed by the main character who will come back for revenge later. For the sake of a peaceful life different from the original story, I devotedly cared for the captured main character and safely sent him back. ‘I haven’t forgotten about you for a single moment, hyung.’ The main character who should have gone far away and lived happily has returned!”