Unfortunately:Fortunately

Unfortunately, that mango was contaminated with a weird illness.

 

Fortunately, there was a cure for the sickness

 

Unfortunately, the cure was deep inside a labyrinth full of man-eating asterisks

 

Fortunately, the labyrinth was a myth and the cure was on the roof of his house.

 

Unfortunately, when it tried to go to the roof of the house to cure it's sickness, it fell onto the ground.

 

Fortunately, nobody was hurt.

 

Unfortunately, someone was actually hurt

 

Fortunately, Serenade is wrong