Ranma ½, part 7 number 4

Ryoga is still trying to get the face off his abdomen that makes him ultra-strong. Ranma changes Ryoga to P-chan but even P-chan is ultra-strong. Then Akane finds the pig and sees the thing drawn on its abdomen.

Later Akane sees the same doodle on Ryoga's stomach but cannot put one and one together correctly. Later she does, but believes it's too strange to be true. All during this time Ranma is still trying to find a way to get the markings off Ryoga's abdomen.