On the 13th Month, the 32nd Day, the world is far too small.

Seventy boys and girls are forced into communal living in a strange underground facility.

Without anyone noticing, one boy disappears. As they search for him, the youths confront the facility's darkness and an inexplicable mystery.

Under a crumbling order and laws beyond the law—some resort to violence, some begin to create a new world, and others attempt to escape to the outside world.

An epic, apocalyptic saga.

This story does not condone or encourage acts that violate laws and regulations. Please be aware that the work contains depictions of criminal acts of varying severity and homosexual relationships, so discretion is advised for those who may find such content uncomfortable.

■This work was serialized on other websites starting around 2010. Due to character count limits and other factors, it has been moved to Narou.

It is planned as a long-form series, and while I sometimes feel discouraged, I will do my best to see it through to completion, so I ask for your support. To everyone who left comments, I was very happy, thank you.