When I woke up in the morning, I suddenly looked like a child ...!? "Chihiro Izumi", who has just been assigned to school as a new teacher, has never lived before. She had no experience of masturbating or sexual activity. She got sick because of that she couldn't grow up. Her treatment is simple: etch a lot, get a lot of excitement, and ejaculate. So her younger sister Himari will cooperate ... Nii Aoi "I'll do anything for Chi-chan!" Furthermore, Eve, an international student, also rushed in ... Eve "Ochin ● Chewy chewy and chewy ~?