Hanahaki

the disease has been copyrighted, so the closest stories you can get to it, are:

http://www.mangago.zone/read-manga/tsubanakasu_haru/

https://drive.google.com/drive/folders/1vPsAS8g1PhPXyxXUIVzDxSkokiZQBWKs (this had to be dropped bc of copyright issues. it's by the author of incorrigible)

http://www.mangago.zone/read-manga/hanaiki_kasoku/

Hanahaki has been patented so you won't find many works around it out there. Sadly（/TДT)/

Here ye goooo although its a dj

http://www.mangago.zone/read-manga/haikyuu_dj_hana_haki_danshi/

Just read this a minute ago lol
http://www.mangago.zone/read-manga/haikyuu_dj_hana_haki_danshi/

http://www.mangago.zone/tag/hanahaki/