OBA-314 The landlady who teases us to no end, Michika Yagi

I'm currently a second wave prep school student. I aimed to pass the exam on my own, but in the end it was no good, so I decided to move to Tokyo and live in a boarding house. In this boarding house, there is an unspoken rule that only those selected by Aunt Michika, the janitor, can participate in special late-night classes. The content of the course is known only to those who participated, but just imagining that it was just the two of us with the colossal-breasted Aunt Michika made my nose bleed. However, on the first day of the boarding house, contrary to my imagination, I heard a moan from the room where the class was being held...