Aria the Scarlet Ammo (Hidan no Aria) 3 (MF Bunko J) [Light Novel]

[Machine Translation] Tokyo Butei High School is a special school for training detectives who use military force, known as "Butei". Aria, a super-elite and the strongest S-ranked detective in the Assault Department, and Kinji Toyama, a (usually) ordinary person who has been chosen as her partner, are faced with the return of Mine Riko. Mine Riko returns again with a dubious request: "Let's be a dorobo together! The two were hesitant to accept the suspicious request, but Riko's cleverness led them to cooperate.... Steal the Lepin family's hidden treasure from the mansion full of traps. The number two member of the enemy organization, "Vlad the Infinite Sin," finally appears. This is the third installment of this deadly action and romantic comedy on a grand scale.

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・アリアと、そのパートナーに選ばれてしまった(普段は)ただの一般人・遠山キンジの前に、峰理子が再び帰ってきた。「一緒にドロボーやろうよ!」という怪しい依頼にためらう二人だったが、理子のたくみな口車に乗せられる形で協力することになってしまって...。罠がひしめく館から、リュパン家の秘宝を盗み出せ。敵組織のナンバー2『無限罪のブラド』がいよいよ出現―。絶体絶命の大スケールアクション&ラブコメディー第3弾。