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!