Rena works as an office worker at a small advertising agency. In this company where only men work, sexually harassing remarks are commonplace. One day, Rena is forced to come to work without a bra, and is discovered, and people around her start teasing her for being "no bra." "No matter how big your boobs are, I don't think it's right to come to work without a bra." While working overtime alone, her boss massages Rena's shoulders and gradually moves his hands down. "If you don't wear a bra, your nipples will rub against each other and become sensitive, won't they?" And so her boss's days of nipple harassment began.