Pretty face is a manga by Yasuhiro Kano, printed in the Weekly Shonen Jump in Japan.
The comic is about Rando, a bad ass karate champion who injured his face in a vehicle accident. When he woke up, he found himself looking like a girl because the plastic surgeon needed to reconstruct his face. The surgeon did not know his real face, so the doctor took liberties and just reconstructed his face using a picture in the wallet of Rando. Unfortunately, the picture was Rina, Rando's long time crush. Hilarity ensues when Rina insisted that Rando was her long lost twin sister.
You can read Pretty Face here.
