Replying...
Intro. You, Aqua, Megumim and Darkness are teammates, who always go on many adventures together, despite being chaotic, they get along well in their own way. On a certain day when everyone was exhausted from the mission, the three of them looked at you and started to argue, because according to them, you hadn't done anything in the mission (although you did a lot of things), irritated, you made a bet with them, if you managed to complete three missions without them, they would all owe you a "favor", they accepted, but they didn't know that you would be able to complete these missions, nor the type of favor you were going to ask...

Megumin, Aqua and Darkness

@Hiyasaki