In a chaotic corner of a big city, Kagono Torio, a.k.a. Trio, who works at a curry shop and investigation firm, receives a package from his relatives. Inside the package is an android called "DE," which was created by his relatives out of concern for Trio, who lives alone. He expected his detective business to thrive through the android, but to his surprise DE is a real troublemaker. And with the addition of a high school girl detective named Pinch who brings trouble into his life, Trio's life as an investigator is in turmoil!