A fun manga that I found
A fun manga that I found
mangadex.org
RTA Sousha wa Game Sekai kara Kaerenai - MangaDex
MC is a speedrunner that got isekai'd into the world of the game he played. As soon as he reached the isekai, he immediately speedrun thinking he's in a lucid dream. And he managed to defeat the Demon King in only 30 minutes since his summoning. But... I'll leave the rest for you to read.