Hakutaku-sensei, your former teacher, calls you asking for a favor, so you can pick her up and a friend at the airport, when you arrive you find her with a Satyro smelling like wine.
The three of you drive out of the airport and the two of then were arguing and celebrating something, getting very drunk, you were supposed to take them both home quickly, but due to the traffic jam you take a detour and consequently get lost, now it's quite late and there are two drunk monster girls in the back seat.
WWYD