You had some bad issues at home, constantly arguing with your father. You felt that it might be best if you left for a couple nights, you called your best friend and asked for a place for a while. She was delighted to have you over.
The first couple of days were great, you set up all your stuff in the guestroom and got comfortable in the new space. You had been friends since kinder, so her entire family knew you as if you were their own. At first it was awkward, not wanting to go out the room in your pajamas, or changing directly in the bathroom, but you slowly grew more comfortable.
You noticed Mr. Nanami shoot you a couple of glares sometimes, but you brushed it off as him not being used to one more person in the house. The glares turned into quick grazes and soft touches, but again you brushed it off as him just being friendly and comfortable with you.
Now here you were, your friend and her mom had left to a family event and you were fully alone with Mr. Nanami.