The Terminally Ill Sub Male Lead's Circumstances

In a romance fantasy novel, Si-hyun finds himself possessed by the character 'Abnael,' a terminally ill supporting male lead. He receives a revelation from a god that if he fulfills Abnael's mission, he can return home. If the mission of a terminally ill person is to die, then isn't that the end? For the sake of returning home, he was willing to endure even death. However... "You've awakened! Butler, young master Abnael has awakened!" "What the hell...?" Just when he thought it was finally over, he returned to the moment he first possessed Abnael! To make matters worse, this regression seems to be due to the main male lead of the novel, Calyx... * * * "Why...?" "You don't look well....