Isami Kondo is finally ready for the entrance ceremony of the National Defense Academy.

Kondo, who is a regular high-ranking honor student in the national standardized mock exams, applied for this school because, "You can study for free, receive money, and put money into your family. It's three birds with one stone." Such Kondo's life at the National Defense Academy began.

Tadashi Harada, Soji Okita, and Toraaki Takei in the same grade. Each of them has different goals, but a fun communal life with their friends should begin...

The day after the entrance ceremony began mercilessly, it was a tough day beyond imagination. 4th grader Sakaki, the head of the room, and Nishiwaki, the sub-head of the room, fly! ! This is Defense University! !