A student of a gal I met by chance is coming to my house. I never expected it to turn out like this. A gal called another gal, and in the blink of an eye, my room turned into a gal-style hangout. Although it was a gal-style room, I invited men to my teacher's house and did whatever I wanted! Even though I called them men, they were all old men. What Yuu of relationship do they have? Should I get angry as a teacher? But I also find myself secretly enjoying their erotic appearance.