The Hanahaki Disease The Hanahaki Disease is an illness born from one-sided love, where the patient throws up and coughs up flower petals when they suffer from one-sided love. The infection can be removed through surgery, but the feelings disappear along with the petals.The illness can be cured without side effects by confessing their love. I am Aya Odette Perez,one of the victim of Hanahaki.