MTL - Chaotic Lightning Cultivation - ~ 856th Kaitenjin Ax

At the beginning, travel to the Holy Land Mary Joa and become a slave of the dragon people.

With the help of the Tianlong people’s “enthusiasm”, Chenos obtained the Devil Fruit that can rebound everything, won the favor of the Empress, learned to be domineering, and also gained the Golden Emperor as his younger brother.

Finally, in order to thank the Tianlong people for their “enthusiasm”, Chenos, who became the five emperors, decided to let them leave the Holy Land Mary Joa and experience the fun of the world!

[No system, no golden fingers, take the road of developing fruits, practicing physical skills and domineering, hoping to bring you a different world of pirates. ]

- Description from novelbuddy

A teenager finds himself in the Marvel World with the Dragon Balls, and has to find a way to survive!

Shenron: “Say your wish! Any wish can be granted, but you only get one…”

Teenager: “Any wish could be granted?”

Shenron: “Of course!”

“Great!”

Teenager: “Shenron, please get me out of the Marvel World; return me to my original world!”

Shenron: “I’m sorry, I can’t do that…”

“….”

Teenager: “What? What were you bragging about then, saying you can grant any wish?”

Shenron: “Your body is from this world, therefore….”

“….”

Teenager: “Okay, then give me the power of a Super Saiyan! I want be able to beat Thor and Hulk, surpass Captain America and Iron Man!”

Shenron: “I’m sorry, I can’t do that…”

Teenager: “Worthless dragon! What can you do?”

Shenron: “I can…”

- Description from Novelupdates

Ethan's head throbbed violently as he opened his eyes, his vision hazy and unfocused. A dull ringing filled his ears, drowning out his thoughts.“What’s happening…?” he thought, his mind sluggish, struggling to catch up with reality. One moment, he was asleep—or at least, he thought he was—and the next, searing pain forced him awake.His vision swam, shapes blurring together in a disorienting mess. But then, muffled noises filtered through the haze—frantic, panicked sounds. Someone was trying to scream, their voice smothered, choked by something.A cold shiver ran down his spine.As his sight gradually sharpened, Ethan's breath hitched.He was on all fours, looming over someone. A girl.Her body twisted and writhed beneath him, ropes biting into her wrists and ankles. Her mouth was gagged, muffling her cries. Her wide brown eyes, brimming with fear and fury, glared up at him.Ethan's body locked in place, his blood running cold.“What the…?” His mind reeled, thoughts slamming into each other in chaotic disarray. “What kind of bizarre dream is this?”Panic clawed at his chest. His breath came in ragged, uneven gasps as he scrambled backward, only to realize his limbs felt sluggish, uncooperative, like they didn’t belong to him.“Is this… is this some kind of twisted fantasy I never knew I had?” A sickening thought slithered through his mind, making his stomach churn.The girl's frantic squirming slowed for a moment, her gaze flickering with confusion as she took in his expression—his trembling hands, his wide, horrified eyes. But the fear returned just as quickly. She struggled harder, her body arching, her muffled screams rising in pitch.Ethan wanted to speak, to say something, anything, but before he could force out a word, a glowing blue window materialized before his eyes.His breath caught.A translucent, hovering screen?“What…?”Lines of glowing text scrolled across its surface.---[System Activated…][Host Confirmed.][Simulating Previous Data…]Ethan awakens in a mysterious world, shackled by a curse that clouds his judgment and drives him toward choices he never wished to make. Burdened by guilt and responsibility, he must navigate the fallout of his actions while unraveling the truth behind the curse—and his place in this enigmatic new reality.

Zavier met Cosmic Consciousness after his death. He was satisfied with every system that Cosmic Consciousness exhibited, so he wanted all of them. Surprisingly, the Cosmic Consciousness obliged him.

Zavier was reborn in an isekai full of magic and alchemy. Now, he had many routes to upgrade. Interestingly, to coordinate these systems, Cosmic Consciousness gave him the gift of being able to duplicate himself. He could clone a finite number of himself to manipulate these systems.

Magus, Alchemist, Mesmer, Tamer, Hunter, Vampire, Werewolf, Dragonknight, Necromancer.....

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By the way, it wouldn't appear NTR or some bullshit harem of courtships. MC of course will have harem but not for cliches.