MTL - My Parents Are Omnipotent - Chapter 3 that's a good guess

After a god screws up and accidentally takes high schooler Shou’s life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble’s son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he’s a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What’s more, though he was smart but unloved in his old life, in his new life he has a mother and a father who both love him deeply. His future as Will is looking very bright and cool!

Within the virtual world of “Avalon Online”, Finn, or otherwise known as “Echo” within the game, was one of its greatest players. After logging off from a long session, however, he notices something awry outside of his apartment.The streets were flooded with chaos, screams echo through the night, and hell is loot loose. Monsters from Avalon Online are running through the streets, wrecking havoc. In the midst of this hellish awakening, Finn is greeted with the one gift bestowed to humanity in this dark hour:[...Assessing life experience…][Assessment Complete][Name: Finn Thorne][Age: 20][Designated Class: Assassin][Starting Level: 5][A [Legacy System] has been bestowed to you for your accomplishments within Avalon.][Assimilation System Awakened.]In this twisted turn, as the world as it was once known is gone with the arrival of magic and monsters, the remnants of humanity must level up if they wish to survive.Finn is left in this dark, hopeless apocalypse, using his own experience from Avalon Online to best survive what seems to be an impossible task.

She was the head of a powerful, medicine-orientated aristocratic family.

Crossing through a millennium, she ended up in the body of the General Household’s “trash” young miss, whose engagement with the Crown Prince was just broken as she suffered under everybody’s taunts!

In the drafting feast, she was re-engaged by the Emperor to marry the famous disabled prince!

Everybody laughed, a blind trash with a disabled wastrel. What a perfect match!

However, they didn’t know that in her hand, she grasped the long-lost primordial pill recipes! Her practice in medicine had reached the apex! Her contracted beasts were unique in the world!

What was the most frightening, was the disabled prince she was engaged to…….

A black-belly full of dirty tricks, with a heaven-opposing cultivation physique, he defeats all geniuses!

In his wheelchair during the day, yet entangling her in bed as he trained his waist muscles… MF! Is he really crippled!?

- Description from Novelupdates

In the spirit of no strategy, Luo Chenyu has been running around in various worlds, live broadcasts counterattacks and slaps his face, and he wants to take the system to the “peak of Tongsheng”.

But later…

The soft cute little milk dog opened her innocent and clear eyes and looked at her eagerly: Sister, I will be obedient~

The sensitive and suspicious prince put the sword against her neck: You can only compensate me for so many years of cruel torture!

The sickly and perverted demon king gently stroked her face: No matter if you go up to the sky, go down to the yellow spring, or live in the sky, you can only stay by my side.

The overbearing monarch put the phoenix seal on both hands: I am willing to risk the world and marry you! Would you like to share this great country with me?

Luo Chenyu: …

Climb all for Grandpa!

*

Someone was secretly jealous, and finally couldn’t help blocking her in the corner.

The face of the ruthless tyrant has a pair of cute furry ears.

“You touched my ear, but you have to be responsible for me…”

Luo Chenyu: Her boss is so cute, it’s terrible!

- Description from novelbuddy