Dies irae ~Amantes amentes~

Night after night, the same dream of a guillotine.
A headhunting serial killer.
And the "knights" in black who follow soon after.
Irrationality that defies the realm of common sense begins to assault and devour the city.
Those abnormalities are abominations that seek to destroy everything Ren has built up with a level of violence far surpassing that fight from two months before.
Unless Ren decides to change, he will die.
And if he does, he won’t be able to return to his old life.
In a world swiftly going mad, Ren Fujii alone crosses the boundary between the ordinary and the extraordinary.