Goo Ga Senbei is the 81st chapter of the Dr. Slump manga.
Summary[]
Thinking he has become old and afraid that he can no longer seduce Midori Yamabuki, Senbei Norimaki prepares and drinks a Rejuvenating Potion. The power of the potion is too great and he becomes a baby again, but retains his personality. Arale Norimaki finds the baby and tells that Midori will come to their house. At first, Senbei is sad to learn that he will not be an adult to greet the woman he loves, but he becomes happy when Midori arrives, realizing that he can use his baby form to watch and abuse her. He looks under her dress, and sees her naked when she takes a bath with the kids. Unfortunately, Senbei reverts back to his adult form while sleeping with her and ends up beaten.