Isekai: I'm The Only One Who Can Go Between Both Worlds

18-year-old Hikari, a young man who views others as nothing more than tools to be used and prefers to be alone, finds a glowing blue ring on the sidewalk with words written on it.

He then finds himself in a medieval world where technology has come to a standstill due to the existence of magic. Able to go between both worlds, Hikari uses technology and his knowledge of the modern world to establish his prowess in the world of Alidith.

Determined to rise to the top, Hikari navigates through this dark and cruel world with a means to rule it all.

With all of these characteristics intact, will he be able to rise to the occasion and make the kingdom of Royse prosperous?