MTL - Paper Plane - Chapter 19

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

From ancient times to the present, it is rumored that there is a spiritual realm in the world.

Regarding the theory of the spiritual realm, celebrities and scholars in the past dynasties have different opinions. The poem records:

“From Qi to Tang, Zishan?

“The spiritual realm is indescribable, and it is difficult to ask for forgiveness for ghost workers.”

- Description from novelbuddy

After her parents had both died in an accident, she had to sign an agreement with him to save her family's company.

It was stated in the agreement that he would save her company on the condition that she would allow him to do whatever he wanted with her.

Just because she resembled the woman he had once loved, he had toyed with her a million times and tortured her in every possible way.

He humiliated her in front of others and then abandoned her. She had loved him, but had suffered.

It wasn't until the agreement expires that she finally ran away from him. By the time she left, she was already pregnant.

A few years later, she brought her adorable child back and became strong and cold-blooded. When they met again, he doted on her so much …

In a world where dungeons were an essential part of it, Rein was trying to conquer as many as possible. They were the key to gain powers in the fastest possible way. So, to reach his full potential and to become the strongest, he became a great dungeon conqueror.With his trusty friends and lovers, he was definitely going to reach the peak alongside everyone. Join Rein and see how he went from strong to stronger and then the strongest.__________________1. The harem would not be too large(I'm not sure how many but probably just 4-5 main and few other here and there). All the girls would be getting their time and story.2. The story is starting when the MC is in the middle of his growth stage and not at the very beginning. But his beginning will be mentioned in the story in some form.3. I don't think I need to mention this, but obviously it will not have any NTR, rape or that kind of stuff. It is actually quite a wholesome story focusing mainly on adventure, action and bit of romance and slice of life.