Uwaki sa Renai Onna no Jouken.

I'm Mami, a girl who's always played on by guys.This time I thought I was his favorite girl, but when another girl knocks on the door of the hotel room,I get thrown out into the veranda, practically naked! Although the guy next door, Iwase-san, saves me, he seems to know everything about my situation. Moreover, he takes the opportunity to give me an "ecchi lesson" so that I won't be cheated on again..!.