Transmigrated as the Cuck.... WTF!!! Novel

Cassius, the designated cuck of the eroge game Academy of Roses, experiences public humiliation across every story route. His life changes when Arawn, a burned-out gamer who attempted suicide after violently avenging his sister's infidelity, transmigrates into his body. Arawn discovers his missing sister has also been isekai'd and now disguises herself as Cassius's noble sibling to avoid suspicion. Learning she faces another forced engagement marriage, Arawn refuses to accept this fate. Equipped with system powers, broken stats beyond average capability, and an intense sister complex, Arawn pursues a simple goal: a peaceful life with his sister. To achieve this, he will break the rules, shatter the narrative, and exploit anyone attempting to play protagonist for his own purposes. The former cuck now has teeth and strikes back with devastating brutality. Warning: Arawn is a villainous, psychotic, manipulative, and unhinged character driven by dangerous obsession.