My Junior Sister Married Someone Else

After ten years guarding the Demon Prison, Chu Yang returns as a Nine Revolutions Heaven Emperor—only to discover his junior sister has married another man. Promised her hand and the sect leader's throne in exchange for his decade of service, he finds himself betrayed and framed as a demon collaborator instead. Heartbroken, he cripples his own cultivation and leaves to honor a dying promise, but even that path leads to conflict when the Gu family violently opposes his marriage contract. Stripped of everything he earned, can a fallen emperor reclaim his destiny?