When he first entered the school, Mizukawa was Sakamoto's class president. But Sakamoto's poor education caused him to be "exiled" year after year. Mizukawa had to tutor him privately but to no avail. And between the two there is a secret that cannot be told to anyone. Sakamoto has a big, strong, solid cock that Mizukawa can't stop thinking about. Her libido was so great that she made Sakamoto fuck her over and over again. Whether in the classroom, in the toilet or at his house,... Mizukawa always wanted to squeeze out Sakamoto's sperm, wanted him to fill her uterus with sperm. Even before the graduation exam, Mizukawa still didn't spare him, still wanting him to get all the sperm inside her. And all of Sakamoto's knowledge also follows the flow of sperm into Mizukawa's pussy, causing him to be "exiled" for another year... The new school year has arrived, and Sakamoto is once again reunited with his homeroom teacher Mizukawa, signaling the beginning of another "hard" school year for him...