Jujutsu Kaisen: I Can Travel Back in Time - Chapter 1: Back to the year it all began

Your meridians cannot be cultivated? It’s ok! There are Crazy Leveling System, do missions, kill monsters, swallow other people’s spiritual power, make pills or forge weapon, participate in big battle, you can gain experience!

The Blue Star connects countless realms, and martial arts enable one to dominate multiple realms. Jiang Ming awakened the Martial Arts Talent System. With each realm he advances, he is bestowed with an ultimate talent: A Hundredfold Comprehension, Mastery of Souls, Spatial Illusions, Sacred Body, and so on. This is an era of martial arts prosperity, with only seven days left until the Federation's martial examination. The entire populace is in a frenzy of preparing for the martial examination. Jiang Ming is like an untamed wild horse, rushing through multiple realms, myriad battlefields, and the vast universe...

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Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

A soul was employed by a higher being to help him manage his world. How will our protagonist live her life to the fullest while also fulfilling her new duties?I don't own Naruto. I adjusted the story to my liking. English is not my main language so don't bother about grammar mistakes too much.