Responses
Not flower vomiting or something but here you go
http://www.mangago.zone/read-manga/tsubanakasu_haru/
It's called Hanahiki Disease
And here's a tag
http://www.mangago.zone/tag/Hanahaki%20Disease/
There’s also a story with Hanahaki disease with the same author as Never Understand, though it has been cancelled due to the hanahaki disease being copyrighted.
http://www.mangago.zone/home/mangatopic/3103170/
Can someone recommend me some yaoi hanahaki idk what's called just the flower vomiting disease