Reborn, I Chose His Twin Brother

In her past life, fox beastman Aria claimed Cedric. Angry at losing his secret lover Bianca, Cedric slaughtered Aria's clan. Reborn on bonding day, Aria chooses Cedric's twin Gavin. Cedric takes Bianca, unaware she's not a rabbit, but a life-draining rat sorceress. When Cedric tries to steal Aria's Purity Crystal and blood for Bianca, Aria exposes her. Cedric is disinherited. Gavin awakens his Heavenly Wolf bloodline, becomes heir, and vows to protect Aria forever.