Matriarchy: My Sickly Younger Brother-in-Law Shows Up and Claims to Be My Husband

Mei Ruyin lost her memory on the eve of her wedding.

When she woke, she recognized no one.

The only person by her side was a young man who claimed to be her lawful husband, keeping her company day and night.

He told her they were childhood sweethearts, a perfect match destined for one another, and deeply in love.

…

When Ming Zhiheng saw Mei Ruyin again, she was engaged to his lofty elder half-brother.

His brother was gentle, considerate, virtuous, and poised. Everyone said that Mei Ruyin of the Mei family was a perfect match for him, a union made in heaven.

Ming Zhiheng hated hearing those words. They tormented him day and night, and he had thought he would never have a chance to touch the moon he longed for.

Until he found Mei Ruyin at the foot of a mountain, apparently suffering from amnesia.

At that moment, his heart leapt with joy.

It was perfectly reasonable for him to take in a wife, wasn't it?

She owed him her life, so offering herself to him in return was only fair.

That was reasonable too, wasn't it?

One-on-one romance. The male lead has no morals or conscience, and every character is evil, including the heroine. Includes confinement scenes and escape attempts that end in recapture.