Toaru Majutsu no Index: New Testament - Volume 16, Chapter 3: Mutual Request for Assistance between Enemies - Double_Enemy.

For He Yi, life was like a coffee table laid with all sorts of coffee mugs resembling her misfortunes. She lost her virtue and had a premarital pregnancy—without knowing the father’s identity—right before her engagement. Her father passed away due to a heart attack when his company wound up. At that point, He Yi’s child was one-month-old and the culprit behind these tragedies was her trusted husband.

Under despair and rage, she drove toward her nemesis to knock him down. That had resulted in her becoming a destitute divorcee who could not afford proper meals after she had finished serving her sentence in prison five years later. She lost everything and her child was snatched away by her nemesis.

Her ex-husband eventually married his mistress who was contemptuous of her. “How are you able to live with this? I’d die much earlier if I were you.”

He Yi only gave a slight cold smile. “The reason I’m still alive is to witness how you go to Hell!”

“Pretend to be my lover and join the social circle.”

Selena, the top star that had the entire world’s attention, was suddenly warped to Northern Duke’s land during an accident while filming. Kalcion, the Northern Duke that saved her from the infernal beasts, offers Selena a chance to go back home in return for collecting information in various social circles by pretending to be his lover. Selena quickly accepts Kalcion’s offer, but…

“Why in the world can’t you do this!?”
“Don’t you think that the answer to that should be obvious to you, the actress, not to me, the duke?”

There was a critical problem. The Northern Duke’s acting skills are horrible!

“…Let’s change the plan. I’ll seduce you instead.”

And thus the contractual relationship between the two started. Will Kalcion’s acting skill improve first, or will he start to have true feelings for Selena instead?

Su Yuzhou reincarnated into the ABO world after his death and became a top-level alpha. Influenced by the conceptions of his previous life, he never thought that a susceptible period would have any effect on him – after all, as an upright young man, how could he be enticed by pheromones to push down a weak Omega?

Then, he became the one who was pushed down _(:з”∠)_

Atypical ABO story, Omega Gong X Alpha Shou.

- Description from Novelupdates

Growing up in a place where the rule of the jungle is law, the simple yet cunning Shaar is thrown into the chaotic world of war and political turbulence. After a chance meeting with a mysterious young girl, his destiny is forever changed as he embarks on a journey, joining the Byzantine army and climbing its ranks. With his bizarre beauty standards, will he ever return the affection of the girls that will follow him? Will he ever learn about his real parents? What lies ahead of him is a journey of strange humor and adventure.