The Hanahaki disease, is a disease in which the victim coughs up flower petals when they suffer from one-sided love. It ends when the beloved returns their feelings, or when the victim dies. It can be cured through surgical removal, but when the infection is removed, the victim's romantic feelings for their love also disappear; I never thought one of my closest friends would suffer of it.. I was walking to the house of my childhood best friend, who was suffering from it.