Paizuri Kyoushitsu -Seiseki Kai wa P-gumi ni Kakuri Sare Kyousei Renzoku Shasei Kyouiku o Hodokosareru Gakkou-

When your grades drop to lowest in the class, you are moved to Class P, which does breast-fucking everyday. As the only boy here, the girls all want to breast fuck you. But it changes into a harem hell when they won't stop no matter what you say, or how many times you cum.