Hiro Kimura was a normal high schooler before the tragic death of his loved dad. Hiro had a hard time because of his father loss but once he finally recovered he got involved with a secret government’s department. Hiro acknowledged something that was gonna cost him his whole life but thankfully the director of the department decided to enroll him as a cadet soldier in the department to spare his life. Is Hiro gonna adapt himself to this new lifestyle? Will his kindness survive until the end?