Sorry for my big boobs

Nana Aoyama is a female teacher who is worried about her class falling apart. Aoyama, thinking about it, consults a fellow teacher, who tells her that the class collapse is a sign of being overly self-conscious about having large breasts, and that she needs to completely bully her breasts and abandon the arrogance associated with having large breasts. From that day on, Aoyama undergoes intense training on bullying big breasts at school... while apologizing for the size of her breasts...