Tsuwabuki Eichi

A miraculous story that saves the world with the power of "stone"! A mysterious power resides in the crystal possessed by Akira Amachi, a boy who is knowledgeable about stones. Using that power, Akira decides to solve various cases! The first episode is about a train derailment! ? A train traveling at breakneck speed heads towards the collapsed railway bridge... Will Akira be able to save the people on the train??　 Akira's miraculous story begins now!!!

A hyperdimensional suspense thriller that will challenge your limits!! A boy, deprived from all memory, found himself trapped in a mysterious world. He soon found out that this was a world of death, a world where you need to risk your life time after time and challenge yourself. Solve the riddles to escape the rooms of death! Kazuma, a young man who has lost all his memories, finds himself in a strange room with five other youngsters when he wake up. In these rooms, riddles spring up one after another, demanding they be solved within a given time limit- or face certain death! In this mental game of survival, what will be their fate?