無論外表還是內在，相川步都只能說是一個平凡無奇的普通少年，然而，一次詭異的遭遇卻徹底改變了他原本波瀾不驚的生活。社會上流傳著令人聞之色變的連環殺人案，相川步做夢都沒有想到，某一天，他會和這一案件扯上關係，而在案件中，他的身份是“被害者”。

一名驟然成為孤兒的男孩奮力對抗手刃雙親的兇手，試圖拯救這顆星球，並發現危險與驚奇交織的新世界。

Kaddy is a young girl from an ancient necromancer lineage who is expected to become the next Supreme Leader of the Necromancer Kingdom. When her apparent hopelessness for the dark arts brands her a disappointment, she decides to prove her worth by setting out on a conquering spree in the Highlands together with her faithful sidekick Fido, a street-performing werewolf.