As Sukuna in Invincible - Chapter 10: Acceleration

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.

Sanctora has known peace for generations—too long, perhaps.Built upon ancient ideals and ruled by a council bound to tradition, the kingdom believes itself untouchable. But beyond its tranquil borders, something has awakened. Whispers of vanished heroes, creatures long thought extinct, and shadows that no longer sleep begin to creep back into the land.Liora never wanted to be a hero. Orphaned young and shaped by loss, all she’s ever known is survival base on love and kindness. But when a brutal invasion exposes the kingdom’s deepest vulnerability, she’s thrust into the heart of a battle far greater than herself. Her light-element magic—once dismissed as minor and passive—may be the key to a new era of power.As Sanctora struggles to adapt, Liora must decide whether to follow the path laid out by those before her… or blaze a new one through fire, blood, and truth.Epic, emotional, and filled with slow-burning revelations, Ancient Beast Summoner is a story of legacy, buried power, and the girl who just might change everything.

Zhang Xuan traverses into a foreign world and becomes an honorable teacher. A mysterious library appears in his mind. As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weakness would be automatically compiled. Thus, he became formidable.

“Emperor Haotian, why don’t you like to wear underwear? To think that you’re still an emperor, can you pay more attention to your image?”

“Fairy Linglong, if you continue to suffer from insomnia, you can always look for me. I have a way with lullabies!”

“You as well, Qiankun Demon Lord, can you cut down on the garlic? Do you want to stink me to death?”

…

This is an incredible story about the heritage between teacher and students, cultivating and guiding the world’s strongest experts.

—Book 2 of 9 in the Quillverse—

Given a second chance at life, Oli’s soul was whisked away through the cosmic void. He opens his eyes to a purple sky with three suns and two moons. Oh yeah, and his parents are gorillas.

However, to Oli’s pleasant surprise, those gorillas raise him with more love and care than his previous parents ever had. That is, until Oli’s father dies defending Oli from a dragon. Oli is then gifted his father’s secret treasure to rampantly boost Oli’s cultivation, also discovering his father to be a wanted criminal.

Oli and his gorilla clan decide to seek a territory of their own, and proudly take control of the nearby beast clans to form a town. With his bombastic uncle leading the clan and his uncle’s feline, best friend creating a cultivation academy, Oli can finally focus on his own growth!

But… That defeated dragon reveals the whereabouts of Oli’s gorilla clan. Spies are sent to investigate everything, while powerful mercenaries are hired to betray and slay the gorillas.

In the midst of the mayhem, Oli is kidnapped! But not by his enemy… Oli is awoken by a mysterious man, a man who claims to be an old ally of the gorilla clan and the one responsible for Oli’s reincarnation into this world.

Oli makes a deal with him, whether he wants to or not, dragging the entire world into chaos, genocide, and all-out war! Everything is for a greater cause, in order for Oli to become the world’s strongest divine beast.