Kaidou Eiri (Arai Atsushi), the new transfer student at Seiei Academy, is actually a agent working with a secret anti-terrorist government agency known under the code name "Sakura." His objective in infiltrating the school is to get closer to Shimada Fumikazu (Takahashi Ryuuki), a boy in his class whose older brother is the main suspect in a serial bombing case. He tracks down the truth behind the incidents with the help of his "Messiah," or partner, Mitsumi Haku (Inoue Masahiro).
Cast & Credits
As a prequel which should have explains the background of this movie series, it doesn't show much about our Secret Service. I don't even think that this movie is about Sakura anymore, but just a bunch of trainees on their first mission. They lacked subtlety, they stuck out like a sore thumb and the fight is just mediocre. The acting is a solid 6 of 10 but you'll see that they improved on the sequel.
Or I guess that's why this is a prequel.