Akuyaku wo Yametara Gitei ni DekiaisaremashitaAkuyaku wo Yametara Gitei ni Dekiai Saremashita; 悪役をやめたら義弟に溺愛されました; When I Quit Being a Villain, My Stepbrother Doted on Me; True Love from a Fake Brother

Reincarnated as the duchess from a novel she wrote in a previous life, Lelia finds herself the villainous character who bullies her cold, expressionless, and beautiful brother-in-law, Rudius, to death. In order to avoid the worst, she takes good care of her brother, but for some reason he presses her for help...?