Erza Scarlet vs. Jiggle Jugs Gang

 is a fight that takes place during the Key of the Starry Sky arc.

Prologue
After retrieving the clock part from the Jiggle Butt Gang, Erza's group head back to the meadows so that they can have another picnic. While they're setting up, they are confronted by another foe: the Jiggle Jugs Gang. The members of the Jiggle Jugs Gang proclaim that women with slender figures can't eat picnics on their plain, then they go to eat the Fairy Tail Mages' food.

Battle
Angered that her second attempt as a "first picnic" has been thwarted again, Erza summons Demon Blade Crimson Sakura, shocking the Jiggle Jugs Gang. Erza states that she will teach them the meaning of "pasts cannot be recalled". Afterwards, she starts her assault on them, eventually defeating them. What happens to the Jiggle Jugs Gang, however, is left unknown.

Aftermath
Erza's group continues to go home with their clock part though while walking, they notice that it's emitting a golden glow. Sometime later, they head to a desert within the country and enter a select ruins.