[DeepL Translation - needs review] Volume 1 Introduction: Tadashi comes to Okinawa with his girlfriend, Kaori. However, while scuba diving, they came across a creature swimming like a bullet in the water, and soon after, they were almost attacked by a shark. After getting out of the water, Tadashi and his friends return to the villa, but this time, Kaori starts to smell something strange. They argue about it, and Hanaori runs out of the room. For some reason, there is a stench in the air out...
