The Eminence in Shadow, Vol. 3 (manga)

The Midgar Academy for Dark Knights is occupied by terrorists posing as the Shadow Garden! Faced with a stressful, high-intensity hostage situation… Cid is having the time of his life! Whether it's being the first student struck down as an example or swooping in dramatically from the rooftops in the nick of time, there's no better opportunity for him to show off his prowess as a shadowy mastermind!

Volume 3 of The Eminence in Shadow manga series by Anri Sakano.