Kuubo Ibuki: Great Game

A military and entertainment-driven era emerges in the year 20YX as global warming reduces Arctic sea ice. Kaburaki, a potential future captain of the Ibuki, is stationed on the Maritime Self-Defense Force destroyer Shiranui, which is deployed for research. A civilian research vessel is suddenly attacked, prompting the Shiranui to respond with its weapons to defend it. The incident raises questions about the identity and motives of the attackers.