A dream world where you can borrow a hot girl who specializes in "sex education" from the library! You can have her teach you about sex while your classmates are studying, or take her home and have her teach you! It's just as natural as borrowing a book and reading it! It's a dream time where Erika Kitagawa, Aika Saya, Nozomi Hazuki, Nanao Riona, and Aiko Endo will teach you about sex gently and carefully!