The Richest Billionaire is My Accidental Husband - Chapter 24

Living an unfulfilled life, Zack Gray meets an untimely end–that is, until he’s given a second chance, in a new world, under a new name: “Leon Schoeller.” Heir to the Schoeller Estate, a powerful and prestigious noble family, a life of luxury surrounded by maids and butlers of elite skills of their own awaits the reborn man.[Lord System Activated.]In addition to being blessed with a genius mind and magical talent, the [Lord System] grants Leon supernatural abilities, from empowering his servants, conquering beasts, and even manipulating his mansion.However, as gifted as he finds himself, the world around him is full of lurking threats, forcing him to level up if he expects to keep his cozy life intact.

This crossing is so strange, death crossing, game crossing, etc. are probably barely acceptable, but why can you cross even if the fish tank is broken?

and actually passed through the magic tree in “OVERLORD” that is said to be able to destroy the world?

No! It is sad enough to regenerate into a plant. The protagonist, Ainz Ur Gong, the undead king, has also accepted the adventurer’s guild mission and wants to kill me!

I want to change my destiny! Live! I want to-surrender!

Ainz: Since he has accepted the job commission from the Adventurer’s Guild, deliberate failure is detrimental to the prestige of Ainz Ul Christine (the “surrender” button has been deducted)

actually died as soon as he crossed, but there is still a chance to return~ from the beginning of the magic tree to this world.

I must change my destiny this time! Live!

- Description from novelbuddy

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

When he was five years old, Xiao Yihan swaggered into Jiang Wei’s room, hugging his little quilt: “Jiang Xiaowei, there’s no one at my home. My dad doesn’t feel assured leaving me alone and told me to come over and sleep at your place.”Jiang Wei stared at him with her wet, round eyes: “If you sleep here, where will I sleep?”Xiao Yihan patted the spot next to him on the bed and said with a serious little adult-like expression: “Here. After all, I’m going to marry you sooner or later. Don’t worry, I’ll take responsibility!”Jiang Wei: “……”What kind of responsibility could a little kid who only plays in the mud take?A story with a bit of sweetness about a cold, aloof dance major girl versus a mischievous medical school heartthrob guy.