Why does love come with flowers? Klance Fanfic

Before reading please go check the rewriting.
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This is a Klance fanfic is you don't ship don't read.
This fanfic is a hanahaki fanfic. Hanahaki disease is a fictional disease in which the victim coughs up flower petals when they suffer from one-sided love. It ends when the beloved returns their feelings (romantic love only; strong friendship is not enough), or when the victim dies. It can be cured through surgical removal, but when the infection is removed, the victim's romantic feelings for their love also disappear.
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Keith has had feeling for Lance McClain since the Garrison. But he pushed his feeling away. When he joins the Blade of Marmora and he's feelings resurface and become strong . He's heartbroken by the way he is with Allura and start coughing petals and blood. Does he tell Lance his feeling, have surgery or dies.
And what happens when a visite to team Voltron goes wrong?
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I don't own Voltron the characters or picture all goes to the creator's.