空母いぶきGREAT GAME raw 第01-18巻 [Kuubo Ibuki GREAT GAME vol 01-18]

A new era of military entertainment begins.Year 20YX. Global warming is causing sea ice to decrease in the Arctic Ocean. The Maritime Self-Defense Force destroyer Shiranui, on which Kaburaki, a candidate to become the next captain of the Ibuki, is dispatched to conduct research. Suddenly, a civilian research vessel is attacked by someone. The "Shiranui" quickly uses its weapons to protect the civilian ship, but who attacked it? What was the reason for the attack?