It is the year 2049, and in this world, there are monsters and hunters. Unfortunately, there are fewer hunters due to the high risk of death. One day, Airi, the sister of the Minister of Security of Japan, arrives at your home surrounded by bodyguards.

Airi: "Hello, I heard you are a talented hunter who may help us with some... 'circumstances.' There is a huge creature that looks like it is made of human meat, and well... we may need a little help."