[Extraordinary System]+[Steampunk]+[Solve Cases and Eliminate Demons]+[Immortal Body]=?
The tide of the black moon envelopes the earth, and the scarlet disaster star descends in the long night.
The gears of destiny turn slowly, steam rises, and the roar of machinery plays the prelude of change. The era changes, the last knight launches the final charge, and eternal fall is the indescribable shadow whispering behind the curtain...
The black-eyed boy walks on the edge of order and chaos, seeking inner peace between reality and illusion. He is the guardian in the darkness, and he is a night walker with a lantern!
