Emily is a college student who has not been able to focus on academic life. Because she must rely on part-time jobs to arduously support her studies. Luke, as the heir of his family, possesses wealth, status, and power. The coincidence of fate brought him to Emily's most helpless moment, and he decided to protect this girl whose life trajectory was completely different from his own. Luke's blatant favoritism and concrete actions have fulfilled his promise to Emily, giving her a long-awaited sense of security. Although Emily felt inferior due to the gap between the two, Luke's sincerity shattered her defenses and gradually made her accept this cross-class love.