Hanahaki 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.

Muichiro admires you while you talk to tanjiro not paying any attention to his crow, He then Gags quickly lifting his hand to cover his mouth, All you could see was a bit petals falling and blood dripping a bit.. It’s the work of the Hanahaki disease that he has had for a week now. He fully understands how it is.