Tetsu Mizuhara shares a lifelong bond with Suzu Urano, forged through shared childhood experiences. As a youth, he endured deep sorrow after his older brother—a student at the Imperial Japanese Naval Academy—drowned in a ferry accident during stormy seas. Suzu comforted him by gifting a drawing titled *Sea Waves and White Rabbits*, depicting wave foam as playful rabbits, an act that kindled his enduring romantic attachment.

During World War II, he joined the Imperial Japanese Navy and was assigned to the heavy cruiser *Aoba*. While docked in Kure, where Suzu lived after marrying Shusaku Hojo, he visited her home on leave and requested shelter for the night. There, he openly declared his feelings, but Suzu upheld her marital vows, leaving their unresolved emotions unspoken.

The *Aoba* suffered critical damage during a U.S. air raid on Kure Harbor, sinking partially into shallow waters. Tetsu survived the attack and remained in service until Japan’s surrender. In the war’s aftermath, he was last seen standing solitary on a dock, contemplating the sunken vessel’s remains, oblivious to Suzu observing him nearby—a moment encapsulating his reflection on loss and time’s inexorable march.

His journey traces unrequited love, wartime endurance, and conflict’s lingering scars. Though his connection to Suzu waned after her marriage, his survival and choices form a contrasting narrative element to civilian war experiences, underscoring how childhood bonds fray into diverging trajectories under history’s weight.