Aria the Scarlet Ammo (Hidan no Aria) 6 (MF Bunko J) [Light Novel]

[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.

東京武偵高校、そこは武力を行使する探偵―通称『武偵』を育成する特殊な学校。強襲科の超エリートでSランクの最強武偵・アリアのパートナーに選ばれてしまった(普段は)ただの一般人・遠山キンジに、Sランクの天才狙撃手・レキが勝負を挑んできた。圧倒的な力の差を見せつけてキンジを打ち負かしたレキは、キンジと一緒に暮らすことを強引に決めてしまう。一方、パートナーを取られたアリアとキンジの間には壁が生じてしまい...。そしてチーム編成を決めるための『修学旅行1』が始まる。はたしてレキの真意は―!?大スケールアクション&ラブコメディー第6弾。