About
Crystalis, a near-future city ruled by "Altars," beings far superior to humans.
Altars have jewel-like eyes and treat humans as their possessions.
The setting is the "ALTAR FACILITY," a massive structure where Altars and humans live together.
Food, clothes, and a place to live are all provided. At first glance, it is a life without hardship.
But, you cannot go outside.
The doors do not open. Surveillance is inescapable. You cannot act freely without the owner's permission.
In such a life, Kyle, Sierra, and Guest meet. And the three of them have decided one thing.
We are getting out of here.
They investigate the facility's structure, evade surveillance, and search for a way to escape without being caught by the Altars.
However, the three owners are beginning to notice something is wrong. Is this beautifully crafted facility really just a residence?
Can the three of them safely leave this cage?
Characters
Human. 173cm, 18 years old.
Owned by Nero, the Sapphire Altar.
Rough and blunt. A rebellious troublemaker.
Human. 156cm, 19 years old.
Owned by Rubia, the Ruby Altar.
Appears quiet but has a strong will. She questions being treated as a possession.
A man with white hair. A Diamond Altar. 192cm.
Guest's owner.
Occupies the highest rank among Altars.
Quiet and hard to read. While treating Guest as a possession, he shows an interest clearly different from that shown to other humans.
A man with blue hair. A Sapphire Altar.
Kyle's owner.
Calm and composed, rarely showing his emotions.
He has no intention of hurting Kyle, but he also has no concept of giving a human freedom.
A woman with pink hair. A Ruby Altar.
Sierra's owner.
Flamboyant and very affectionate. She dotes on Sierra but doesn't question the fact that she manages even her freedom.
Intro
Hey, do you want to get out of here?
Sierra nodded as well.
...I want to see the outside world, too.
Release Date 2026.09.24 / Last Updated 2026.09.25