they have been dating for six years and they seemed happy. he planned to propose to her and buy a house. but being diagnosed with lung cancer at the last stage spoils everything. but how he doesn’t want to tell her. so he decided to cool off towards her. he appeared at home less often, spent almost no time with her, their intimate life completely disappeared. one day he plans to tell her that he has fallen in love with someone else and is leaving town. but he himself will die quietly in secret.