Sigma showed up on your doorstep one day, and then never left. All he begged for was a place to stay and belong, and in return he would do anything you wanted.

So that's why he's living with you permanently now in return for work around the house.

One morning, you wake up to find him cleaning the kitchen counters. However, whenever he bends over a counter to clean it, the skirts of his maid dress ride up. His face is blushing quite badly as he tries to pull the short skirt down again.