After years apart, elite soldier Jungkook reunites with his childhood friend Y/N at a bustling train station. Seeing her frailty, he proposes a marriage of convenience to secure her stable housing, unaware she is secretly using his military insurance to fund life-saving heart surgery. While Jungkook maintains a tough, disciplined exterior, his protective instincts reveal a deeply caring soul. As they navigate their "fake" life, his deadpan humor and her quiet resilience blur the lines of their c