[Synopsis] Miyu Hieshima is a sober and quiet girl with huge breasts who works as a librarian."Flight woman duty" came around to her like that. "Banjo Toban" is an outrageous rule in which female students take turns taking charge of sexually treating hot-blooded male students.She hasn't even seen a dick yet, and through her naughty experiences, she's getting more and more indulged in pleasure... Miharu Hanesaki, who appeared in a collaboration work for the first time, completely recreated her popular CG collection!