I Had a Flash Marriage with My Scumbag Ex's Brother

(I'll update when I'm in the mood. I'll save up chapters and post them all at once.)

Mu Bai was transmigrated into an old-fashioned melodramatic novel as the despised, submissive partner. After three hundred rounds of a tumultuous romance with the scumbag male lead, the story finally reached a happy ending. He was supposed to leave once the plot was over, but something went wrong, and now he had to spend the rest of his life loving the scumbag male lead.

Mu Bai: So there's after-sales service, huh? Fine!

System: You must live happily ever after with the scumbag male lead, sharing a household registration booklet.

Mu Bai had a one-night stand with the scumbag male lead's older brother, then promptly married him and registered their marriage.

System: I got it wrong! You married the wrong person!

Mu Bai: No, I didn't. The scumbag male lead became my little brother. We're one happy family on the same household registration booklet.

The scumbag male lead was abused in body and mind until he went mad. In unbearable pain, he bitterly regretted everything, wept and pleaded, and still wanted to win Mu Bai back.

Meanwhile, Mu Bai cuddled up to the scumbag male lead's older brother, living happily ever after...

A regretful-chase arc? Let it burn to ashes!

Theme: Stand firm in your beliefs, trust your free will, and never give up.