From Now On, I Am the King of Ruin

In a city where superpowers and technology develop side by side, an uninvited guest from Rune Continent comes. In another world, he passed on his mantle just to renew his relationship with his queen. —————— I'm a new author. I've searched all over the Internet but haven't seen any good Foyego fanfics. I'll give it a try myself and be merciful.