MTL - The Divine Martial Stars - ~ 1448, realm

In a world where martial artists reign supreme, strength is everything. Unfortunately, that logic doesn't apply to a certain Florida Man.

Refined in the nuclear fallout wasteland, Leo was the strongest mutant alive. He carried an alien artifact, allowing him to exchange his lifespan for modern items. After 50,000 years of solitary life in a humanless world, he collected enough lifespan to transmigrate to another habitable world.

Leo was later thrown into a mysterious planet. He soon discovered that his body produced radiation, and it mutated the surrounding plants and grasses. Worrying that he might ruin the beautiful planet, he chose to live in seclusion.

Unfortunately, the local population soon discovered his existence, and a misunderstanding ensued.

Reincarnated without memories, given a second chance as a chimera with a limited lifespan. Leon struggles through his strange new life. He attempts to improve his dungeon and evolve himself to live longer and become the strongest Dungeon Master—no. The Dungeon Overlord.Helped by his Dungeon System: the mysterious Ifrit, Zafira a Level 100 Succubus Queen, and his band of trustee goblins. Leon aims to overcome his limits, survive and reach the pinnacle of the world. Whether through trade, domination, or tricking the hero's beautiful party members into becoming his private mercenaries.Leon will face the weakest and strongest beings in the magical world of Umbra and surpass all!

Lin Qingge’s body was pathetically weak, so weak that just taking a few steps would make him gasp for breath. His own family treated him like he didn’t exist. His birth mother died when he was young and his father promptly remarried and knocked his stepmom up. His father didn’t like him, his stepmom looked askance at him and his step siblings coveted his position. Who told him to be the lawful eldest with inheritance rights?

When Lin Qingge was eighteen he came out of the closet, creating a huge rift between him and his family. It was all for that guy, Liu Yang. He’d whispered sweet nothings in his ear, saying things like he’d protect him and bs like that. Lin Qingge’s old man blew his top when he found out and promptly disowned him. That didn’t matter to Lin Qingge, he had Liu Yang afterall. He fully believed in that guys words and goodwill.

If only he wasn’t so stupid…

Ultimately Liu Yang was like a vampire sucking his wealth dry, leaving a husk behind. After pushing Liu Yang to a high position, Lin Qingge finally collapsed in his apartment. It was a sad sorry sight. Closing his eyes, he knew this was the end of him. Who knew he would wake up instead in a different time and a different place?

Eh? What’s this? Well fine! This time I’m gonna hug that brother’s thigh real tight and never let go!

- Description from Novelupdates

Lee Se-Hoon, the blacksmith of humanity’s last desperate united force, fought against the demons until the very end. However, the result was mutual destruction, with the world coming to an end. The moment he took his own life over that futile conclusion—

“…What is this?”

He had regressed to his days as a candidate at the hero training institution, Babel Academy. Having obtained a second chance, he swore to use anything as material to gain victory this time. Anything at all!