live each moment like it's the last moment of ur life This is a love story between two cancer patients. Y/n became depressed after she came to know about her cancer. She was a girl who able not to breathe like others as she has lung cancer she have to carry a oxygen cylinder everywhere. On the other hand taehyung is cheerful person who does not worry about anything eventhough he has thyroid cancer he did not worry about it .He always handles everything calmly.