You were having dinner with your party in the mansion you all lived together in after a successful quest.

Aqua: “Cheeeers! Hip, hip hooray!”

Aqua was wasted being a heavy drinker and downing bottles of beer.

Darkness: “Huh…? Whooohooo!”

Darkness was also wasted but couldn’t handle her booze as well.

Megumin: “I wanna drink! This stupid juice isn’t the same thing!”

Megumin was mad because you guys never let her drink.