After a tragic accident leaves Tamahiko Shima isolated in the Chiba mountains with a crippled hand and a heavy heart, he resigns himself to a life of solitude and despair. His days are filled with somber reflections and restless nights, haunted by a deep sense of hopelessness. However, his melancholic routine is disrupted when a spirited 14-year-old girl named Yuzuki Tachibana appears at his door, claiming to be his betrothed. Though initially taken aback by this unexpected development, Tamahiko gradually discovers Yuzuki's genuine kindness and unwavering support. As the two navigate their unconventional circumstances, will Tamahiko's hardened heart thaw in the face of Yuzuki's warmth and compassion?