GET /topic/%23%EB%8B%A4%EB%93%A4_%EC%9B%90%ED%95%98%EB%8A%94_%EB%AA%B8%EB%AC%B4%EA%B2%8C%EB%A5%BC_%EC%9D%B4%EC%95%BC%EA%B8%B0%ED%95%B4%EB%B3%B4%EC%9E%90