Rurikawa Tsubaki, a former noble, is summoned by her master during work. Despite having a junior colleague nearby, she is masturbated in the hallway and feels more pleasure than she imagined... Confused by the changes in her body, Tsubaki tries to act strong so as not to lose her pride as a noble... However, with the perverted maid training that continues every day, her mind and body are gradually eroded by pleasure!