Yuto Ishikawa, a 16-year-old second-year high school student from Reihan Academy, was walking while reading a short story on his phone. There, he accidentally met a high school girl named Yuna Takahashi, who is a serial killer who also kills men. He didn't run away; instead, he felt a surge of excitement in his blood.

Yuna was interested in Yuto's attitude, but what if love was formed between a man who yearned for the excitement of seeing a blood and flesh in real life and a serial killer who found pleasure in killing? Would they be together and overcome the challenges in their life?