Raden was just an ordinary high schooler until he opened a mysterious chest in his warehouse. That one decision bound him to a sinful spirit, forcing him into a contract that now shares his body. Within the shadows of Spectre City, he can transform into Astral Rage, wielding speed and strength far beyond human limits. But that power comes with steep costs and brutal consequences.

To Raden, this ability is no gift, it is a lifelong burden. He has no desire for luxury or glory. All he wants is a simple life, a quiet existence hidden away from a world that has turned undeniably cruel...