I Hate You More Than Anyone

Kazuha Akiyoshi is the eldest of six children. Highly responsible and irresistibly cute, she is also something of a tomboy who never allows her softer side to show through –– until she meets Mizushima, the first guy to treat her like a girl. Kazuha has her first real crush; will it be reciprocated? Then there's Sugimoto, an older guy who wants to be an important part of her life — but he's the one who Kazuha hates more than anyone! (Source: CMX) Part of the Akiyoshi Family Series. 秋吉家シリーズ 1. ...

Sekai de Ichiban Dai Kirai had 9 volumes published in English as I Hate You More than Anyone by CMX Manga from July 31, 2007 to March 3, 2010. An ISBN listing was made for the 10th volume's release on July 20, 2010 but the publisher went defunct before printing.