I Don't Like You At All, Big Brother!! (お兄ちゃんのことなんかぜんぜん好きじゃないんだからねっ!!, Oniichan no Koto Nanka Zenzen Suki Janain Dakara ne—!!, sometimes shortened to Ochinko) is a Japanese seinen manga series written and illustrated by Kouichi Kusano which began serialization on Futabasha's Web Comic High! service from August 2008. It has been licensed in North America by Seven Seas Entertainment. It has been adapted by Zexcs into an anime series which aired in Japan between January 9, 2011 and March 27, 2011.