Aria the Scarlet Ammo (Hidan no Aria) 7 (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 man who has been chosen as the partner of Aria, a super-elite and the strongest S-ranked detective in the Assault Department, is on his way back to Tokyo, leaving Reki in Kyoto, who has been disabled in battle. He and Aria have not been able to repair their relationship... In the midst of such a situation, the evil hand of "Manbu" was once again approaching... Aria and Kinji begin their ultra-fast revenge battle on a train that has been turned into a runaway express by an "acceleration bomb" planted in Riko's seat. And then, a gust of wind descends... This is the seventh 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・遠山キンジは、戦闘不能におちいったレキを京都に残し、東京への帰路についていた。アリアとの仲も修復できていない...そんな状態の中、再び『万武』の魔の手が迫り―。理子の座席に仕掛けられた『加速爆弾』によって暴走特急と化した列車を舞台に、アリアとキンジの超高速リベンジバトルが始まる。そして舞い降りる、一陣の風―。大スケールアクション&ラブコメディー第7弾。