Deborah is my Rival 

A compilation of the Deborah ga Rival series. Asayo starts university and lives alone for the first time. However, the handsome blonde guy living next door turns out to be an okama! Umenosuke Ichimatsu of the famous tea ceremony family is a cool guy who goes by the name of "Deborah." But unfortunately, he's a girl on the inside. So Asayo hangs out with him as a girlfriend… and falls in love with him? (Source: Media Do) Note: Includes the two-part oneshot “ Uwasa Jouzu no Usagitachi”; not included in the ebook edition.