UwU

http://www.mangago.me/read-manga/hanaiki_kasoku/ ?

This manhwa here, sadly had been dropped by the author due to some copyright issue regarding that disease, it's from the same author of Never understand
https://drive.google.com/open?id=1vPsAS8g1PhPXyxXUIVzDxSkokiZQBWKs

You were the anon asking about the hanahaki disease before right? Sadly it’s been copyrighted so there are not a lot. There is a manwha which was on Lezhin which was called ‘Spring in the heart’ but it has been taken down. The same author as ‘Never Understand’ made it. :,)

Thanks for answering, i found it!