Ichiban Ushiro no Daimaou - Volume 10, Chapter 1 — The Janitor’s Frightening Trap!

The idiot Long Gen pretends to be a pig and eats a tiger, takes advantage of the girls in the village, travels across the countryside and forests, monopolizes the beauty and coquettishness, and achieves the legend of “Dragon Gen”. There is a widow in front of the door leaning on the door to watch, and a sister-in-law next door looking through the screen window… This book is determined to be a stallion, with the goal of pushing down and being pushed.

- Description from novelbuddy

At first, when he learned that he was forced to go to many different routine worlds and be reborn into all kinds of cannon fodder, he was against it.

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.

“I can’t believe my eyes. The ice lord actually kissed a man. God, help me!”

“I’m surprised that the son of the Bai family is actually the ugly and stupid second young miss!”

Who was it who melted the ice lord’s exterior and caused the awakening of his hidden gentle side?

She is black-bellied and crafty. She would never consider herself a good person, and would not go out of her way to provoke other people. But, once she is provoked, she will pay it back 1000-fold, showing no mercy.

He is cold and detached, elegant, magnanimous, and known as the ice lord, a heartless gentleman.

Will sparks fly when the iceberg collides with a black-belly? Is it hopeless, or will there be excitement?

- Description from Novelupdates