Hana(2000)

Hana

Suzuki has a rare disease with no known cure. All that is known is that the virus comes from soil, and over time causes the human body to decay and rot into earth. Though his time is running out, Suzuki continues to attend school, and is cared for by a kind and beautiful doctor. Together, they view beautiful flowers and think of what it means to bloom...

(Source: Anime-Planet)