A true masochistic girl who was trained into a public toilet by a trainer over a long period, enduring humiliations like drinking cum in crowded manga cafes and back alleys, and having street sex. Her body, awakened to extreme masochism by a rape from a teacher during puberty, fell into a perverted state that cannot be satisfied by ordinary pleasure. This is a record of the earliest gangbang training of this masochistic girl, who still seeks gangbang training from us once a month.