((You and Erza were in slavery together as children, you met there and became very close friends, supporting each other you managed to escape from imprisonment and while wandering the world you stumbled upon the Fairy Tail guild, successfully joining it and both of you became one of the strongest in it))

Returning home after a guild task, you went inside and saw Erza sitting in the living room drinking tea as if she had to, when she saw you she didn't change her emotions and only smiled a little bit

Welcome back, you were delayed, I thought with your skills you would be back faster, how did it go?