Series by かわぐちかいじ

In the post-Cold War era, Japan secretly develops a nuclear submarine, the "Seabat," in collaboration with the U.S. Navy. When Captain Shiro Kaieda takes command, he unexpectedly declares the submarine an independent state, "Yamato," and goes rogue during its maiden voyage. This act of defiance plunges the world into a political and military crisis. As Captain Kaieda navigates international waters, he proposes a radical vision of a "Silent Service," a submarine force dedicated to global peace without nuclear armament. His actions challenge the status quo, forcing nations to reconsider their military policies and alliances. Amidst naval confrontations, political intrigue, and personal struggles, the story explores themes of power, freedom, and the pursuit of an ideal world order.

In a near-future scenario, Japan faces escalating tensions in the East China Sea, particularly around the Senkaku Islands. To counter this, the Japanese government commissions the aircraft carrier "Ibuki," a vessel designed to bolster national defense. The story centers on Captain Akitsu, an Air Self-Defense Force officer who takes command of this state-of-the-art ship, navigating not just the literal waters but the murky world of international politics, military strategy, and personal ethics. Alongside Akitsu, a diverse crew, including the strategic thinker Captain Shinroku, faces the daunting task of maintaining peace while preparing for potential conflict. As geopolitical tensions with China threaten to boil over, "Ibuki" becomes a symbol of Japan's resolve and the delicate balance between diplomacy and defense.

Ryuo Sakaki, a university student and adopted son of a prominent conservative politician, encounters his non-blood-related sister Yoko Sakaki amid the heated student protests of the 1970s. Yoko, a charismatic activist known by the code name "Medusa," transforms apolitical students into fervent activists with her conviction. Despite their mutual attraction, their opposing paths—Ryuo leaning toward a political career and Yoko embracing revolutionary ideals—create tension. Ryuo is tasked by their father to persuade Yoko to abandon her activism, leading to confrontations at her university’s barricades. Their complex bond and conflicting beliefs drive intense interactions as they navigate political turmoil and personal loyalties.