Kukkyou na koufu ya senshi ga daraku shiteiku

In a quiet mining town, Craig and his son Wilson live a modest but peaceful life. That changes when Osmond, a wealthy alchemist, arrives and hires the miners to extract a strange white mineral hidden deep within the mountain—an area long forbidden. Unbeknownst to them, the mountain is no ordinary rock but a shell, holding a slumbering demon named Priapus at its core. When a sudden explosion traps the miners underground, chaos erupts. With no one else willing to take the risk, Craig ventures alone into the collapsing tunnels. His mission: rescue the trapped miners and uncover the terrifying secret buried beneath the mountain.