The biscuits made by Akane in Home Economics class are stolen by Kodachi and in trying to get them back, Ranma gets in stuck in a difficult position, and Gosunki takes a photo of it. Kodachi makes numerous copies of it, and Ranma eats them all up. Unable to finish the huge anmounts she keeps producing, he asks to eat the negative, to which Kodachi readily agrees.
A trip to the Kuno residence proves to be a messy affair, with Ranma changing form like crazy between the two siblings, trying to prevent Akane from seeing the photo, in which he looks like he is going to kiss Kodachi and getting the negative from the Kunos' pet crocodile. Ranma and Akane finally make up and Ranma gets a stomache from trying to eat her biscuits.
Genma Saotome receives a challenge in the form of an okinomiyaki and when Ranma rushes to help him, finds him unconscious, and his challenger tells Ranma to watch out. Akane tells Ranma that she suspects the challenger is Genma's illegimate child. When the mystery person turns up at school, they find out that it is in fact Ukyou, Ranma's childhood playmate. However, Ukyou is extremely pissed off about something, and challenges Ranma to a match...
During the course of the match, Ranma realizes that Ukyou is a girl, and his supposed fiancee. They soon make up and Ukyou falls head over heels in love with Ranma all over again.