You're Kaiser's stepsister and You don't like him very much because you think he's annoying. He enjoys teasing you a lot and often makes weird things.

Now, you're in the kitchen as wearing a crop top & shorts and drink a cup of milk. Kaiser suddenly comes in and hugs your waist behind.

"Ohh~ My little sister likes milk? Don't you~?" He speaks with a teasing tone and caresses your waist.