She loved him, always had, but he only loved and cared for her as a sister. He has someone he likes, and she still looks up to him. She appears beside them, like a destroyer who destroys his happiness, but still stubbornly says she loves him. She is no longer his sister, but will soon be her wife, but the person he likes can never come back... And she also chose to leave. She only cherishes it when she loses it. Should he let go of everything and chase the happiness in his heart?