The Demon Monarch

Abbott traveled into the Endless Abyss and became a fledgling demon at the bottom of the abyss.

He had thought that he would become a high-level demon cannon fodder, but he hadn't expected that he would actually activate the signing system!

You can become a high level demon by signing up for a year!

You can become a Son of the Abyss by signing up for ten years!

You can become a Demon Monarch by signing up for a hundred years!