The former Sanye Academy, the quiet ivory tower specially designed for girls, has now quietly transformed into a SORD (Special R&D and Operational Training Institution) national defense talent training base.In this no longer calm land, the girls shoulder the mission of protecting the country in different ways: Ren Nai is the leader in the field of firepower, Nai is good at melee fire suppression; Toka and Hu Tao show amazing tacit understanding and accuracy in the field of sniper; Christina controls the explosion art and data battlefield with a calm mind; while Zi is a shadow-like existence, proficient in ninjutsu and intelligence collection. They are no longer girls who read quietly in the classroom, but soldiers who face danger and go deep into the center of the storm.Faced with high-risk tasks that cannot be solved by the police and the Self-Defense Force, they set foot on unknown battlefields again and again.The smoke filled the gunpowder, the bullets roared, and the blood dyed the trajectory of youth red. This is a story that belongs to them - tempering and growing up in the fire of war, finding meaning in sacrifice, and writing immortal bonds in mutual support.This is not an ordinary campus memory, but a passionate poem composed of gunfire and heartbeat.