One rainy night, she became his sister. For 18 years, it was his responsibility to love her, love her and protect her. She was ridiculed and bullied, but he was the first to stand up and help her, telling the bully to get out of his way. She loved him, but she couldn't love him, so she tried every means to occupy him. He loves her, but he doesn't know it, his heart has drifted towards her