Yuuko-sensei is a serious and enthusiastic new teacher. She has little experience with men. But her L-cup breasts, which are too big to hide, are always the object of desire for the men at school! Every time a fellow teacher or student comes on to her, Yuuko resists with all her might. But her sensitive body can't help but react... She gives a virgin a blowjob, has wild sex with her teacher, is made to cum with bondage lotion, and ends up in a 4P orgy with teachers and students all mixed up together!