I Bound Myself to a Destructive Witch - Chapter 737 - 705. Miss Mu has it.

I was a failed experiment

Light and color, sound and scent;Clothing, food, shelter, transportation, smartphones, computers;Burning, freezing, friction, explosion, thunder, rain, growth, decay;All material changes and chemical phenomena;Our bodies, our thoughts, our world—were all built upon electromagnetic interactions!Whoever could control electromagnetic forces, they would be the tyrant who dominated the world!However, electromagnetism is too profound for us, so let us start by learning how to “Discharge”...

“Your frog cub will bring you back the travel specialty [Wu Dun·Xueji Boundary]!”

“Your frog cub brought you a souvenir [Eternal Kaleidoscope Shaker Eye]!”

“Your frog cub brought you back the souvenir [Bamen Dunjia]!”

Traveling to the world of pirates, what Bai Ye didn’t expect was that a small game called “Traveling Frog” that he had played turned out to be his golden finger.

Also, the entire game has completely changed!

The place where the little frog travels has turned into various dimensional worlds!

And the original ordinary specialty has become a special product of each world!

Relying on the special products brought back by the little frog, Bai Ye can continue to become stronger even if he salts the fish every day.

Not only that, the friends the little frog has made in these worlds will come to visit from time to time.

“Ding dong! Frog cub’s little friend Hinata Hinata is visiting, let’s treat her with specialties~”

- Description from novelbuddy

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.