Futaba-kun Change! is a manga series created by Hiroshi Aro. It originally ran in Monthly Shōnen Jump from 1990, but switched to Monthly Shōnen Jump Original in 1993. It ended in 1997. It is about Futaba Shimeru, a high school boy who discovers that he and his family have a genetic defect that can make them switch between male and female.

Misaki-chan Change!? (Volume 4, Chapter 3)