A series of slaughters suddenly occur in a Japanese town. Amidst the atmosphere of the crime, Sasa Kaminoki is living her life with her natural cheerfulness. One day, Sasa encounters a suspicious person and is rescued by a blonde-haired young man. She leaves school with a senior whom she has feelings for. While her daily life is changing slowly and lightly, there is a violent case that remains unsolved. Then, Sasa has a chance encounter with the god of death and sees the truth...

Saegusa Ran is a professional killer. Usually in the suburbs of Tokyo, she owns a small herb shop. But, once she receives the request of a murder, she puts on the face of a ruthless assassin!? 冴草（さえぐさ）蘭はプロの殺し屋。普段は東京の郊外で、小さなハーブ店を経営している。だが、ひとたび殺人の依頼を受けると、非情な暗殺者（アサシン）の顔に!? Used Google Translate.