Ultraman: From the Start, I Became a Compatible Host, with Leo as My Master

[One heroine + original setting + no System + not a reborn story]

Note: No New Generation Ultramen will appear in this story, except Zero.

My master is Ultraman Leo?!

What do you mean my master's other companions are Ultramen, too?

This is an age overrun by Space Beasts, aliens, and all kinds of monsters. Anyone could become a light.

Han Yan had a happy family, but when a Dark Giant attacked, he lost both his parents and the home he had lived in. He struggled to survive on the meager inheritance they left behind. One night, he dreamed of some ruins. When he opened his eyes again, he was already holding a strange object. By chance, he came across an online post about sharing a villa rental, and met twelve roommates, each with a different personality...