从鬼的尸体中诞生的少年，手持名为“鬼切丸”的日本刀。渴望成为人类的少年深信斩尽所有魔鬼后自己就会变成真正的人类，但由人类的悲、憎、怨等负面感情衍生的魔鬼岂能斩尽杀绝？追踪着世间漂浮的鬼气，少年继续着与魔无止境的战斗。
A.D.POLICEに勤める佐々木健児は、刑事としての腕前は一流だが他人とのチームワークが苦手で、しばしば相棒を事故に巻き込ませたり、同僚とトラブルを起こしていた。
Min joong and Ga hee are a campus couple and friends of Geun tae. Gentai has a crush on Jiaxi, asking her out to dinner and telling her how he feels about her. Ga hee knew his feelings, but she told him that she had fallen in love with Min joong and did not acknowledge his feelings for her. Gentai was dissatisfied with Minzhong's treatment of Jiaxi and felt sorry for her. Therefore, Genta came up with a plan to break them up by introducing a girl named Abbott to them...
