Toaru Majutsu no Index SS - Volume 1, Chapter 1: Pot with Meat and the Appetite for Great Tactics. A_Required_Thing.

Transmigrating from the Apocalypse to a technologically developed, peaceful world, Qiu Yu’s killing skills cultivated through hundreds of life-and-death situations suddenly lost their use, and even his body turned into a weak, squeamish…

Qiu Yu’s world views shattered into pieces: What the heck is an Omega?!

Qiu Yu, who knows nothing but fighting, eventually decided to become an anchor for a full-dive game—not only could he use his battle techniques to make a living, but he also didn’t have to brave leaving the house and meeting people—it was the perfect job.

However, in his first-ever broadcast, he shot an arrow straight through the heart of the e-sport circle’s verified no.1 god of war.

Mu Feibai touched the place above his heart, the corner of his mouth hooking up: Interesting… Come play professionally.

Qiu Yu rejected him: social anxiety, not going, see ya.

…And then he was sold off by his live-streaming platform to play for a professional team.

Qiu Yu: This was different from my plan!

Mu Feibai: You shot an arrow straight into my heart… baby, you still want to run?

- Description from Novelupdates

Luo Yi, a high school dropout in his original world, was isekai’d into the world of the Witcher 3. Starting out as a weak boy named Roy in the village of Kaer, Lower Posada, he was determined to grow stronger, no matter what it took. The first step toward becoming a legend was to kill. And his first kill was… a rooster. ‘You gain 1 EXP.’ Of course, Roy had his own cheat system like all the other isekai protagonists. His first step to becoming a legend started now…

The tale of Oliver.
An orphan boy from a Mine, in 19th century Europe, filled with Magic.

What do you do when your brother dies because of some entitled assholes? You go undercover.My real name? Clare. But at school, I’m Clause—just another guy blending in. Disguised. Watching. Yes, a boy. No, it's not an all-boys school—I'm just deep undercover, hunting down the bastard responsible for my brother’s suicide. Nobody—and I mean nobody—messes with my precious brother and gets away with it. They better pray I never find them, because when I do? Death will be a mercy, and trust me—I don’t do mercy.And as for the egotistical Alpha and the narcissistic Vampire Prince? They can go fuck themselves. I don’t do mates, I don’t do claiming, and I sure as hell don’t do them.