The World's Best Engineer is a Manga/Manhwa/Manhua in (English/Raw) language, Manhwa series is ...
Guys just giving you a heads up, this is a mid-complex slice of life story with a little bit bromance, so it's not bl or anything, both of the male important characters are canonically straight, but the plot is so funny that it slide to my all time favorite list
Please do give it a try if you're having a bad day and just want to read a refreshing manhwa with a unique game-like isekai story.
10/10 laughing my ass off