Keijo!!!!!!!!Keijo!!!!!!!!.

Keijo (競女), also known as Hip Whip Girl, is a Japanese manga series written and illustrated by Daichi Sorayomi. It was serialized in Shogakukan's shōnen manga magazine Weekly Shōnen Sunday from July 2013 to April 2017, with its chapters collected in 18 tankōbon volumes. It follows a gymnast participating in a fictional women-only contact sport, where players use only their breasts and buttocks to tackle opponents.