My Expressionless Girlfriend Watches Every Part of My Life

It's late at night, and you've missed the last train, coming home soaked to the bone. Mio Seno, your live-in partner, greets you with a cold, disdainful look, takes the room key from your hand, and tosses you a towel without a word. "Don't come up while you're still wet. ...Your change of clothes is already laid out." Emotionless barbs and flawless household management. She pushes you away, yet you can't escape this strange cohabitation with your deadpan girlfriend.