Other name: ダイヤのエース, ダイヤのA, 钻石王牌, Ace of Diamond, Ace of the Diamond, Daiya no A, Daiya no Ace
Summary: It is a manga of high-school baseball. The main character, who is a pitcher from a country high school, gets teamed up with a catcher from a school with an elite baseball team. He decides to quit his school to attend the school that this catcher plays... Winner of the 53rd Annual Shogakukan Manga award (2008) and the 34th Annual Kodansha Manga Award for the Shounen category.