The Darkness was Comfortable for me - Chapter 54: Exclusive Chosen Bulletin Board JPN [No.1000 – Kurose Hikaru] 2581th

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.

“Jiang Yu transmigrates into a novel and becomes a side character in the book.

Legend has it that the world’s most formidable man Xu Shuangtze owned a cherished portrait of his deceased wife. But no one knew that on its back was another portrait of his arch rival who Xu Shuangtze had killed with his own hands.

Sixteen years ago, the Chief of Immortal Alliance’s Department of Discipline, Gong Wei, brought a blade with him on the Immortal Ascension Platform. His assassination of Xu Shuangtze failed and he was slain on the spot by the sword named No Way Out.

Sixteen years later, Gong Wei opened his eyes and found himself reborn in the body of a beautiful fool who even had to kneel down when talking to Lord Xu.

This was not the only disturbing thing for him.

Because of his ravishing good looks, remarkable power and status as well as his premature death in his previous life, he was now the beloved muse of countless writers. Books and stories featuring him as the main lead to all kinds of relationships were circulated far and wide. Even among the famous sects there were rumours of his forbidden encounters with every sect leader…

- Description from Novelupdates

The protagonist, having degenerated into a “loser” after being unable to find employment, gets caught up in someone else’s attempt to commit suicide-by-train and ends up traveling to another world. The numerous cheat powers he demands from God are all granted to him. But contrary to expectations, these powers bring about disastrous consequences for the protagonist.

Having reincarnated into another world, the optimistic protagonist (Yuuri) starts his(her) heart-warming training days with his(her) teacher.