Six years ago, an accident changed my life. For six years, that accident has haunted me like a nightmare, leaving me with sin in my heart, living like a shell, and not daring to let go and love. Six years later, a cunning and bright girl broke into my world, and everything in the past slowly surfaced. When I slowly tried to face my most secret self and stopped escaping, I realized that fate had played a joke on me again. Whether to let go, or atone for sins, whether to continue to escape, or to devote selfless love, it seems that everything has already been answered...