Reborn as the Male Lead's White Moonlight

Before she was reborn, Lan Rouwan believed Prince Yiyang Murong Feng loved her. In truth, he married her only for Lan Yu. Even though Lan Yu saw Murong Feng merely as a stepping stone to becoming empress, he was still willing to do anything for her. Later, when the entire Murong family was sentenced to death, Lan Rouwan couldn't bear to see this loyal family framed. Disguised as a man, she entered a gamble she was destined to lose. As the truth of that year was gradually revealed, Lan Rouwan had already died far from home. Murong Feng was consumed by regret, but it was too late.

Reborn, Lan Rouwan has just married into the Murong family of the Prince of Zhennan's manor. She plans to treat him with mutual respect, but who could have known he'd cling to her instead?

In short: the male lead realizes he loved the wrong person, and he's reborn. I couldn't find a story like this even though I wanted to read one, so I wrote it myself. Updates whenever inspiration strikes.