College student Tarou has found and purchased the next-generation human-type onahole. A sex android that looks just like his childhoods next door neighbour. A girl he longed to play with in the past. The onahole, named Naoko, was delivered on the same day, and immediately connected to a PC and started, but what... an error message is displayed ...!? Setup failed!

Naoko comes home from shopping, only to find that Tarou has cheated on her with his old 2.nd generation onahole.