Toaru Majutsu no Index: New Testament - Volume 16, Prologue: Holing Up at School, Starting with Swimsuits - Melt_the_Asphalt.

Mu Jingzhe transmigrates into a book filled with sweet, doting love to become the useless supporting character who serves as a foil to the female lead. She also becomes the stepmom of five kids to her recently deceased husband.

Shen Sui’an penetrated into a book of dog-blooded beauty and became the white moonlight of early death that four scumbags could not seek.
He tore up the script, took his lover into the Imperial Marshal’s Palace, drank tea every day, basked in the sun, rua rua seriously injured the unconscious plant lion, and by the way teased the soldier orphans adopted by the Gu family – a group of plush cubs , the days were pretty cool.
As a result, one day, the plant lion suddenly woke up, returned to human form, and blocked him in the corner.
The man’s face is handsome, his physique is strong, and he has been in the top position for a long time, giving people a strong sense of oppression.
At this moment, his brows and eyes were downcast, revealing a pitiful meaning for no reason, “When I was in a coma, I said that I liked me the most. I finally woke up. Why do you only play with those little cubs?”
Shen Sui’an: “…”
***
Overhearing the big lion that turned into a human shape discussing a proposal for marriage, Shen Sui’an was struck by thunder and ran away all night in fright.
A few days later, there was a knock on the door, and the big lion squatted obediently, with a wooden sign hanging around his neck: Homeless, seeking adoption.
Seeing that Shen Suian was unmoved, it lay down silently, its tail hooked on Shen Suian’s hand and pressed against its soft belly.
The wooden sign was turned over, revealing the following line: touch my stomach, be responsible for me.
Shen Sui’an: Hello, the Imperial Police Station? There are lions touching porcelain here!

Playful plush control is attacked by x stuffy big lion

Content tags: Interstellar sweet text cool text cute pet
Search keywords: Protagonist: Shen Sui’an ┃ Supporting role: Gu Beimo ┃ Others:
One sentence introduction: Eating melons and watching dramas, rua lions, cool!
Purpose: to break through the predicament and move towards a better life

- Description from novelbuddy

Have you ever thought about how your life would turn out at the age of 18?Well before I could even say that I was an adult to even say I was going to conquer it.The world had seemed to already be determined of what mine and the rest of humanity would be when the first Leviathans was made public to our world.

A serious accident caused the protagonist’s brain to have an unusual mutation. This changed the brain development that it opened the door to a mysterious universe. Not only he obtained a ‘god-like’ powerful telekinetic control and mental perception, he also had an abnormal analysis and memory capability comparable to super computer. Having such super brain, his rough life began.

Brain development progress 10%…….20%……50%….80%…. …100%

- Description from Novelupdates