Japan's military struggles in the Russo-Japanese War demand desperate measures. The government resurrects the Raimu Squad: five ordinary schoolgirls who pilot giant mechanical weapons in humanity's darkest hour. These soldiers attend classes by day and prepare for combat by night, caught between adolescent yearnings and the weight of national survival. Inukai Kyoushirou arrives as their new commander, a young officer burning with patriotic ambition. His task seems straightforward: lead these girls to victory. What he discovers instead are five distinct personalities, each wrestling with the collision between personal desires and duty to country. Romance blooms amid the machinery and gunfire. Schoolyard crushes intertwine with life-or-death missions. The girls must balance homework with weaponry, first loves with first battles. This is wartime romance grounded in historical crisis. The tone shifts between intimate character moments and mechanical warfare, asking uncomfortable questions about sacrifice and adolescence. For viewers drawn to stories where personal stakes matter as much as grand conflicts, where mecha serves character rather than spectacle, Raimu finds its gravity in the gap between who these girls want to be and what their country needs them to become.