What is "nononono"

is a Japanese manga series written and illustrated by Lynn Okamoto that began serialization in Shueisha's seinen manga magazine Weekly Young Jump in 2007. The plot follows ski jumper Yūta Nonomiya, the son of a disgraced Olympian who aims to reclaim his family's honor. However, he is actually female, the twin sister of the real Yūta, who perished in a fire. Nononono was serialized from October 2007 to December 2010. A total of 13 tankōbon (bound volumes) compiling the series chapters were printed by Shueisha from March 19, 2008 to February 18, 2011.