Gantz

So, there’s this manga about Masaru Kato and Kei Kurono, just your average high school students. One day, they’re hit by a subway train while trying to save a homeless guy. But get this – instead of dying, they wake up in an empty Tokyo apartment! They meet a guy named Joichiro Nishi, who’s like a pro at this weird game they’re all stuck in. Oh, and there’s this mysterious black sphere called “Gantz” in the room too. Looks like they’re in for some crazy adventures!