From the Start, I Have a Mysterious Core

Song Han wakes up one day to discover that he's become a villain in some power fantasy novel. But he has a laptop that transmigrated along with him, and it can produce items from games, anime, and movies, showing Song Han another possibility:

Protagonists, you can play around on Blue Star all you like. I'm off to explore the stars and the sea!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.