特别性调教培训合格的Miku被分配到一号街边公厕工作，职务是肉便器。按规章miku必须要以下身三洞被塞满的状态步行到岗，即使高潮也要保持微笑。

Miku, who has passed the special sexual training, is assigned to work in the No. 1 public toilet as a meat toilet. According to the regulations, Miku must walk to the working place while all three holes are filled with toys, and keep smiling even if she reaches a climax.