One

Hanahaki disease is an illness of unrequited love.

Marinette developed the disease first, as she fell for Adrien. But he only saw her as a friend.

Adrien developed it next, as he fell for Ladybug, but she only saw him as a partner.

Neither wants to forget their love, and neither will admit that they don't have much time to live.

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As well as here this fic can be found on the Miraculous Amino. Thank you for your support, I hope you enjoy this fic :)

-Roman