Shiho grew up being compared to her wonderful twin sister, Miho, by her parents. One day, she loves her sister's fiancé, Fuuma. Shiho continued to hide her unforgivable thoughts, but suddenly her sister died in an accident and Shiho instead got engaged to Fuuma. "I'm just a replacement for my sister" - contrary to Shiho's wishes, Fuuma gently embraced Shiho like a true lover? A long-awaited manga with a wonderful and painful love story!