From Cancer Cell to Venom

Office worker Lin Yi unexpectedly transmigrates into a cancer cell inside the body of the genius beauty Su Linyue. Watch as Lin Yi goes from being a cancer cell to reaching the pinnacle of all worlds, while also finding himself a tsundere wife. (The protagonist won't suffer, there's one heroine, and no System.) I'm terrible at writing blurbs, so just read the story.

Worlds visited: Demon Slayer, One-Punch Man, Douluo, Marvel, and Journey to the West.