Fairy Tail Fanfiction : Heavenly Body Fever

Siegrain, the most powerful mage in the magic council, the great wizard saint, the genius plus the youngest member of magic coucil who've been become one of the most important person in Fiore, HAVE A FEVER! What would be happened if Erza, his (maybe)enemy, found out about this and trying to take care of him?

JERZA/SIEGZA