MTL - Later, He Became a Royal Healer - Chapter 6

Leiyin accidentally crossed into the One Piece World, and accidentally obtained the Naruto System.

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.

Kai was a 17-year-old dropout. A NEET. A background character in real life with nothing to his name but bitterness, novels, and guilt. After his parents died, he gave up on the world. People were fake. Dreams were pointless. And that one novel he kept reading? He hated it especially the main character, June. Perfect, noble, always standing tall. Everything Kai wasn’t.Then, one night, a voice asked: “What if you did meet June?”He said yes, half-asleep and half-mocking.Now he’s trapped in the novel. Isikeid. But he’s not June. He’s not a hero. He’s not even in the main cast.He’s an extra in the background of a world he knows too well and he’s had enough of watching things play out the same way. This time, he’s going to change everything. Whether the world likes it or not.

As the daughter chosen by the Heavens, she was already extraordinary from birth. However, with her talents concealed, she was treated like tr*sh and mercilessly betrayed. So, she decided to let her supreme capabilities shine!

From then on, her bloodline had been awoken. Everything was possible—refining antidotes and weapons through alchemy, taming the dragons and phoenixes, and even being the ultimate ruler of the world. Since then, millions of people admired her and she lived up to her name as the strongest concubine in the world!

Only that cold, evil and immensely domineering Ice Emperor, whom she had accidentally provoked, loved, protected and helped her everywhere…

“Oh dear, after he has treated me like that, how can I ever like someone else? This man is really cunning!”