"Sensei, Sensei... What's wrong with you? Are you cold? Oh, my God! I must come to you as soon as possible and feed my huge juicy delicious Breasts!" 

Reina-Chan has been in love with her teacher for a long time, but he is completely neutral towards her and all the other students. Girl subculture "Gero" and not used to just give up especially some sensource. Rayna became more insistent, and her courtship became more and more depraved...