Mastermind, I'll Do Anything For You But Marriage!

Mastermind, I'll Do Anything For You But Marriage! summary: Reincarnated as a doomed bride fated to be killed on her wedding night, the only way to survive is to cancel the marriage. Just as all hope seems lost, a mysterious man offers an unexpected solution—marry someone else instead. Desperate, she proposes to him on the spot, only for him to accept immediately.