To Love-Ru Ep 7 - M2F Transformation

Episode 7 All Men Should Be Like This!
Ren (who has build a musculer body) does a 120 Kilometer run for his final trail, when he finished, Lala was about to tell how manly he is but when fly goes on his nose which causes him sneeze and transform into girl, the same girl Rito met in the beginning. It turns out that Ren's alien race is a memorzean, who are able to change gender with a certain trigger (in Ren's case, he turns into Run whenever he sneeze), Lala then says that she can't say how manly a girl is.