Reincarnated as a failed hero?! Watch me Defy Fate! - Chapter 115: Battlefield of Hellfire

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.

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.

Zhuang Feng is in his last year of high school, and he’s just moved to the city. He lives with his good-for-nothing cousin, who’s always on business trips falling for get-rich-quick scams, and his Saozi (sister-in-law), who tries to make his life miserable as much as possible. There’s one upside, though; she. is. freaking. hot. But one day, he found a piece of her underwear in the bathroom…. And unfolded a series of events that will turn his life upside down.

- Description from Novelupdates

In a single day, a global calamity wipes out humanity, leaving their souls adrift in an endless void.An enigmatic entity, responsible for the catastrophe, offers a twisted mercy: reincarnation into a deadly“King's Game.”Every soul from Earth must choose a character card to determine their new form and fate.Chaos erupts as billions scramble for power. Some snatch weak cards in haste, while others luck into formidable ones.Su Ping, caught in the frenzy, watches desirable roles like Goblin King, Blood Goblin King, and even Succubus King vanish.Desperate, he claims the only card left: Dark Dragon King.To his shock, this “lowly” dragon bloodline ranks among the top 1000 strongest. As Su Ping finds himself in a treacherous cosmo's where every player is a king vying for supremacy, he wonders:If a dragon is this low, what monstrous powers lie at the top?