[Machine Translation] Tokyo Butei High School is a special school that trains detectives who use military force - a.k.a. "Butei". Kinji Toyama, an ordinary person who is (usually) chosen as the partner of Aria, the ultra-elite and S-ranked strongest military detective in the Assault Department, is challenged by Reki, an S-ranked genius sniper. After defeating Kinji in an overwhelming display of power, Reki forcefully decides to live with Kinji. Meanwhile, Aria and Kinji, whose partner has been taken away from them, find themselves at odds with each other.... Then, "School Trip 1" begins to decide the team formation. What is Reki's true intention? This is the 6th volume of a large scale action and romantic comedy.