Scarlet Descent - Chapter 53 - Twenty-One Bullets

What could be worse than getting married to a demon prince as a human princess for a forced truce?Being in a place surrounded by demons was like a nightmare to Aelin. Demons and humans have always despised each other after all. But things only go downhill, when her husband leaves her shortly after they spend a night together to go fight a war with unknown beings which leaves Aelin at the mercy of her enemies

In her previous life, she loved a prince who didn’t love her back. She was framed and her heart was torn out. After rebirth, she wanted to live unrestrainedly, but accidentally married Ling Chen, the Fourth Prince who was calculating, manipulative, and had bad reputation.

Conspiracy, hypocrisy, greed, framing, blackmail, she took them all one by one. Getting a big payoff for a small effort, love is like a sharp knife!

Lan Ling: Why did Wangye climb over the wall and come to my room?
Ling Chen: Why do you think I’m here?
Lan Ling: Does Wangye likes climbing to someone else’s bed in the middle of the night?
Ling Chen: Presumptuous! How is this someone else’s bed?

- Description from Novelupdates

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!