Minato Hinageshi, a 21-year-old firefighter driven by an unwavering sense of justice and selflessness, first crosses paths with Hinako Mukaimizu while battling a blaze ignited by illegal fireworks at her apartment complex. Their rescue mission blossoms into romance, with Minato openly admiring Hinako’s surfing prowess and urging her to channel the boldness of her wave-riding into daily life. A meticulous cook whose patience mirrors his quiet determination, he covertly hones his surfing skills through relentless practice, refusing to let initial setbacks deter him.

His resolve to safeguard others stems from a childhood near-drowning where Hinako rescued him—an event that crystallized his firefighting path. This history weaves reciprocity into their bond, as he evolves into her steadfast emotional support. Tragedy strikes when Minato perishes in a storm during a daring attempt to save a stranded jetskier, leaving Hinako adrift in grief. Yet his spirit lingers, materializing in ripples and reflections whenever she sings “Brand New Story,” their shared anthem. Though his ethereal presence offers solace, its intangible nature compels him to gently push her toward healing.

In a climactic act of protection, his spectral form guides a surge of water to shield Hinako and his sister Yōko from engulfing flames—a testament to his enduring vigilance. Through fragmented voicemails and memories, Minato’s parting words urge Hinako to “ride her own wave,” galvanizing her pursuit of lifeguard training. His legacy intertwines love and loss, championing resilience and self-reliance even as his influence echoes beyond the grave, affirming bonds that outlast life itself.