Being Op With My Broken System: All Limits Have Errors - Chapter 3: System is broken? The Dragonic magic academy.

Park Moonsoo worked REALLLLLLY hard in life before dying.

Pei Shiyi, who had been dead for hundreds of years, was suddenly resurrected. He was poor, homeless and was an unregistered resident. In order to settle down, Pei Shiyi took over a cat cafe.

The cat cafe was poorly managed and on the verge of closing down, there were only two to three real kittens.

Pei Shiyi fed the kittens and set a small goal for himself: for example, first, become the best cat cafe in this city. So a year later, a cat cafe called Xian Chan rose to prominence.

The Jin Hua cat that practiced Daoism for hundreds of years became a fat orange cat.

The Bi An came here and became a golden British shorthair.

The lively and active leopard cat was a real leopard.

It also came with a fluff-obsessed, non-human Director of Administration. After sniffing* the fat orange cat, the leopard cat and the ragdoll, he even began sniffing* Pei Shiyi.

The fluffy Pei Shiyi, who was a real phoenix: Do you want to die?

Director Bao: Sniffing cats is fun, sniffing you is addictive.

- Description from Novelupdates

Innocent looking but is actually a scheming lawyer Omega (gong) x Gentle and honest police officer Alpha (shou)

Nie Zihang and Yu Jingxuan’s first encounter took place in the police station late at night. Because his omega lover had cheated on him with an alpha, he had tossed a sphere of concentrated pheromone extract into a packed hot pot restaurant. He had to tell his lover that all alphas were wild animals that couldn’t tell friend from foe when they sense pheromones.

The story concluded with him being questioned by a police officer who, despite his gentle voice and dainty features, turned out to be an alpha as well.

“Mr. Nie, as a lawyer, don’t you think it’s bad to deliberately break the law?” The alpha asked him.

Nie Zihang casually tossed a video recording of the incident while smiling. “In accordance with the ABO Protection Act, my actions were lawful as self-defense. Officer Yu, you should not show unprincipled favoritism to wrongdoers simply because he’s an alpha, okay?”

The alpha courteously released him.

He assumed the issue was over until the next day, when a familiar face arrived at the law firm. A casually dressed Yu Jingxuan entered his office and mused, “Mr. Nie has a strong animosity against alphas. Would you mind if I asked you for help suing an ex-boyfriend? I want his reputation to go down.”

Nie Zihang arched his brow. “Oh? More information would be appreciated.”

Only then did he learn that Yu Jingxuan was also engaged in AA relationships. His ex-boyfriend had also cheated on him with an omega.

Since AO is the right path, why don’t we give it a try?

Anyhow, the gender also coincided well.

- Description from Novelupdates

Having been reincarnated, Shen Changqing became a member of the Great Qin's Demon-Subduing Division during an era infested with Demon Evils and rampant Strange Monsters—After slaying a Ghostly Level Fiend, his Pure Yang Technique reached Perfection!After slaying a Resentment Level Monster, his Heavenly Martial Gang Qi reached Perfection!After slaying a powerful Demon Evil, he broke through his own limits!After slaying—Years later, Shen Changqing became the Defender of the Human Clan, and all sorts of Demon Evils and Strange Monsters bowed their heads in submission!“As long as I live, the Human Clan shall not perish!”