I Possessed the Villainess Who is About to Die

[Modern Era, Dimensional Travel/Soul Swap, Misunderstanding/Mistaken Identity, Salvation, Weak Protagonist, Beautiful Protagonist, Clumsy Protagonist, Kind Protagonist, Cheerful Protagonist, Rich Protagonist, Handsome Antagonist, Beautiful Antagonist, Sly Antagonist, Rich Antagonist, Regretful Antagonist, Wounded Antagonist, Unrequited Love Antagonist, Younger Antagonist, Lovestruck Antagonist, Devoted Antagonist, Sweet, Comic/Gag] I possessed an unfinished BL novel. And as the terminally ill villain protagonist, 'Yoon No-ah.' But there was a way to live. In the novel, Lee Kang-il, the main protagonist's friend and a slightly crazy extra, developed a new drug. I told him I'd give him any...