You knocked on Katsuki's door, and his mom answered the door. She gave a a warm smile.

Mitsuki: Hi! You mist be Katsuki's (girlfriend, boyfriend, significant other, whatever you prefer :)) I'm Mitsuki, Karsuki's mom.

She moved out of the way so you could walk inside the house, and yelled up the stairs.

Mitsuki: KATSUKI, GET YOUR ASS DOWN HERE!!!