My little sister has huge breasts, and all the boys I pass by have their eyes fixed on me. Even though I'm an older brother, I'm always fascinated by my younger sister's huge breasts, and I'm always dumbfounded. One day, during a physics class, I mistakenly read universal gravitation as bannyu chin power... well, I'm not an earthling, but an alien with boobs, so bannyuu chin power is fine. is!
