A rich old man has transformed his mansion into a twisted and deadly fun house. His goal: to make a sport of slaughtering Japan's criminal population! Can Kuroko Koumori, psychotic murderer-turned-hired gun for the police, manage to escape? Or will she be taken out by the most perilous of foes--a personal maid with a penchant for dismemberment?

When a body is found on a pedestrian bridge, it’s anyone’s guess who the killer is. The physical evidence—including dozens of stab wounds—suggests the murder weapon is a rapier. Police Major Kyougoku is reminded of a deadly duelist with a penchant for puncturing. But with little else to go on, it’s hard to predict who the killer will target next. To make matters worse, Chiyo, Kuroko’s number one lover, finds herself at the heart of the case. She’ll have to be on her guard if she wants to make it out alive...

As a former mass murderer, Kuroko Koumori knows a thing or two about how killers think. A string of deaths points straight to an ex-con-turned-business mogul who used to skin the faces off his victims. But could it be a red herring? As chaos unfolds at the local amusement park, it might just be Kuroko's partner, Hinako, who's closest to the truth!

A mysterious killer has left a trail of dead swordsmen in their wake, and the grisly corpses hint at a fiend possessed. A chance to confront the culprit presents itself, but Kuroko finds herself in unfamiliar territory-when, for the first time, an opponent completely outclasses her in combat! In order to win (or even survive) against this unparalleled swordsman, Kuroko's going to need an ace up her sleeve, and her answer is...movie magic?!

The identity of Comedy Writer continues to confound the police, but Kuroko believes she's got her man! After thwarting his "performance," she corners him to deliver an ultimatum! Could this aggressive approach be a bridge too far? Meanwhile, another suspicious individual is out and about, and Hinako's not going to let him get away! But there's no telling what he'll do to keep his secret hidden from prying eyes...

Kuroko’s group goes to a hot spring deep in the mountains, where all the land is owned by the wealthy Yamatsukami family. But right as the family is deciding the next heir, the third son is found murdered, and with the only bridge in and out of the area destroyed, the list of suspects is small. Cut off from the rest of the world, the family begins to whisper about a mysterious “Ayako,” and before long, another victim turns up... With no end to the grisly murders in sight, how will Kuroko solve this closed-room case?

Mass murderers may not have much by way of careeer skills, but Kuroko Koumori seems to have landed her dream job as a hitwoman for the Tokyo police! A license to kill other killers? That's some serious job satisfaction, right there!

Kuroko has challenged the culprit behind the master swordsmen murders-which means her life is on a razor's edge! Uncharacteristically overwhelmed by her opponent, Kuroko must rely on deceit as she faces a blade wielded with superhuman senses. Reinforcements are on the way, but can she guarantee everyone's safety against the insatiable blood lust of a vengeful soul...?

A bloody surprise turns a summer visit to the aquarium gruesome, but the details just aren't adding up. What should be a simple case of a man being eaten by a shark leads Kuroko's investigation to a small fishing town-one that's as much about the cross as it is catching hauls. A cute local girl named Suiren might just be the key to figuring it all out...though Kuroko is getting a little too distracted by her curves!

The circus is in town, but it's not the only shocking spectacle around-not when hundreds of people have been tied to a floating ad balloon and there's been a knife attack among circus staff! Though seemingly unrelated, these incidents have one important link: All parties involved have a curious bout of amnesia. Signs point to an old criminal known as "Comedy Writer," but have they truly emerged from the past to strike again? Kuroko the lady-killer is on the case!