She's The Mad Bride!

After three years in a psychiatric hospital, Sienna Harper returns hardened and out for revenge. Discovering her stepsister is set to replace her in marrying Payne heir Julian, she storms the wedding with fellow patients, exposes the fraud, and strikes a deal: her 90% family assets in exchange for a marriage of convenience. While she reclaims her legacy with ruthless force, he uses her help to gather evidence against his uncle—the man who killed his parents. Through kidnappings and mutual rescues, they take down both corrupt families. Only then does Julian confess he’s loved her since their school days, symbolized by a cherry‑blossom keychain he kept for years. On their old school track, they vow to share the only future that matters—together.