Aria the Scarlet Ammo (Hidan no Aria) 13 (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". Kinji Toyama, an ordinary person, is chosen to be the partner of Aria, a super-elite and the strongest S-ranked detective in the Assault Department. Kinji realizes his true nature in the unfamiliar life of a "civilian" and returns to the military detective high school he once left. He returns to Baskerville, where he was once expelled from school, and finds himself once again in the middle of a battle. He and the other members of Baskerville decide to take advantage of their school trip2 to raid the main camp of Aibaku, which has launched a surprise attack on them. The battle takes place across the sea to the enemy territory of Hong Kong! This is the 13th installment of the large-scale action and romantic comedy series.

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。慣れない“一般人”の生活の中で、自分の本質を悟ったキンジは、一度は退学した武偵高に戻ってくる。そして、戦いの中にまた身を投じることになる。彼を中心とするバスカービルの面々は、修学旅行2を利用して、急襲を仕掛けてきた藍幇の本陣に乗り込むことを決意する。戦いの舞台は、海を越え敵地・香港へ―!大スケールアクション&ラブコメディー第13弾。