Ranma ½, part 5 number 2

Ukyo's secret is revealed, that she's actually a girl. Ranma pours hot water over her, thinking she has a Jusenkyo curse, and she replies 'does the sight of cleavage make you insane?'

Genma then tells Ranma that Ukyo is yet another of his fiancees, and he explains the back story to what happened. The girls at school hear the story and end up beating up both Ranma and his father (who happens to be yet another male in the story who has no sense of honor at all. Mousse, Ryoga, the Card King and Genma are all honorless. Ranma has honor, although he also has a huge ego and antiquated views on women. Dr. Tofu is about the only male in the series who is actually quite honorable.)

Ranma tells Ukyo that she's cute and that, of course, gets Akane angry. Ryoga shows up and starts attacking Ranma.

There's a very interesting drawing on page 21, the top one. The figure in the middle resembles the face of an ancient artifact that has been interpreted as being the face of an actual alien. The overly-large eyes could be goggles of some sort. Ukyo shows up and Ryoga attacks, thinking Ukyo is a male, but Ranma gets him straightened out, then beats the stuffing out of him.

Later Ukyo finds out Ryoga is in love with Akane, and she sees her way to eliminate one fiancee rival.