Yui is a maid with a bad habit of giving in to her own desires even while working. One day, the homeowner's son accidentally witnesses her seducing the homeowner and becomes so aroused that he ejaculates on the spot. Noticing this, Yui gently places her finger over the flustered son's lips as he tries to explain himself, tenderly embracing his feelings. This brief moment of contact deepens the connection between them even further.