Mysterion

This is the story of a boy who lives in the depths of a cavern made into a dungeon. He lives alone with his troubles, he thinks he has forgotten something. Something deeply important, but his constant battle prevents him to start remembering. The boy is also often visited by an old friend who always shares stories of the outside world. Although, it's been a while since his friend visited and the boy is in worry. Not long after, another one is tossed inside his cell, and thus his new story unfolds.