**Viruses vs. a shark-type artificial creature!**
To protect humanity from the threat of viruses, the genius scientist Kyou Rouhan created K-1, a therapeutic shark-type bodily sea fish that can swim freely through the human body. However, K-1 has a vicious personality, and is a dangerous being who could become an enemy of humanity But then, by chance, K-1 combines with a kind-hearted boy who cares for his younger sister!? A marine scifi fantasy about fighting viruses!
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