hanahaki : a disease in which the victim coughs up flower petals when they suffer from one-sided love. Can only be cured when the feelings of love are returned. If they are not; surgical removal may happen, but along with the removal of the disease, the victim's feelings for their love will be wiped away. or Taehyung begins to cough up flowers, the start of hanahaki, and his love is none other than Jung Hoseok.