Nasa Yuzaki, bearing the written name "Hoshizora" (starry sky) but pronounced like the American space agency, endured childhood teasing that fueled his academic ascent. Achieving Japan’s highest middle school exam scores earned him the "deviation value" moniker, driven by his parents’ ambition for him to embody "a man as vast as space." His trajectory shifted during third-year middle school when a snowy-night accident irrevocably altered his path. While crossing a road toward Tsukasa—a captivating stranger—he was struck by a truck. Tsukasa shielded him from fatal harm, vanishing post-rescue despite her injuries. Nasa chased her through snowdrifts, blurting a marriage proposal and confession before collapsing. This encounter spurred his withdrawal from formal education, opting instead for part-time jobs while clinging to hope of their reunion. On his 18th birthday, Tsukasa reappeared with a marriage registration form. Their swift union at a ward office launched an unconventional cohabitation. Nasa grappled with marital realities, his social awkwardness and romantic inexperience contrasting with fierce resolve to prioritize Tsukasa’s happiness. Domestic knowledge gaps spawned comedic mishaps, yet his earnestness anchored their bond. Professionally, he pivoted from customer service to remote programming post-marriage. His technical prowess resurrected a failing bathhouse through financial analytics and automation, revealing latent business instincts. Later, he taught programming at a girls’ high school, barely older than his students. Pragmatism shaped habits like securing valuables in safes and leveraging cloud storage. Devotion defined Nasa: he chronicled Tsukasa through photographs, openly marveling at her beauty, while habitually neglecting his well-being—a trait echoing his dismissal of grave injuries during their first meeting. They navigated shared challenges—sleep arrangements, chores, social nuances—with gradual adaptation. His later gift of a smartphone underscored growing attentiveness to her needs during separations. Rooted in Nara City, his family endorsed his unconventional choices. Financial prudence amassed 5 million yen savings, contrasting Tsukasa’s thrift. Academic brilliance coexisted with pop culture ignorance, remedied by online searches. Childhood resilience hardened into relentless perseverance, propelling him through every obstacle.