Peaceful Diary of High School Fleet

As Japan evolved into a prominent maritime nation, the demand for skilled professionals dedicated to safeguarding its waters led to the establishment of specialized academies. Set within one such prestigious all-girls institution, the story follows young women who have enrolled with a singular ambition: to become "Blue Mermaids." These aspiring seafarers undergo rigorous training that blends intensive classroom instruction with hands-on practical skills, preparing them for professional lives devoted entirely to the ocean. Guided by their enduring motto—"In the sea we live, the sea we protect, and by the sea we go"—the students strive to embody the highest ideals of their calling. To earn the distinguished title of Blue Mermaid, they must do more than simply excel in their academic studies. They are expected to cultivate a broad, international mindset, developing a deep understanding of both their own heritage and the customs and cultures of nations across the globe. As the recognized "Elite of the Sea," these young women dedicate themselves to mastering the knowledge and discipline required to protect the maritime world they call home.