A girl has always been in love with a boy, but because of family ties, the boy had to break up with her. The heartbroken girl didn't know what to do. One day, she came to the beach to relax and stopped thinking about suicide, but was saved by a boy. From then on, she was entangled with the boy until they fell in love. In the end, the girl found out that the boy she liked was the younger brother of the first boy, and he also had a disease. . . The two of them overcame many difficulties and thought the ending would be perfect, but they didn't expect it. .