Ryuoh Yano, a Japanese mystery writer, has another job as a systems engineer. One day, he is ordered to move to Kobe for work. He leaves his lovely family in Tokyo to start a new, lonely life in Kobe. To ease his loneliness, he purchases some pets: two small, cute loaches. Yano was to start a new life with his new pets, but inexplicable, mysterious incidents started happening to them. Although Yano tried to solve the mystery as a mystery writer, he couldn’t believe an unexpected truth he finally saw in the end. This work was exclusively written as one of the made-in-Japan content belonging to The BBB: Breakthrough Bandwagon Books.