Arachnid summary: Alice, a high school senior, endures the daily torment inflicted by her uncle with whom she resides. Unexpectedly, Alice becomes a witness to the murder of her uncle by the assassin named "Kumo" (Japanese for Arachnid), and subsequently, loses consciousness. Upon awakening, Alice realizes that she is in the residence of the same assassin who had executed her uncle... Alice, now devoid of any living relatives, is under the care of Kumo himself...!