ArtemisFowl's manga / #gender bender(2)

Welcome to Tokyo Crazy Paradise, the alternate future of Japan's capital, Tokyo. Born into a police family, baby sister Tsukasa gets raised as a boy in order to protect her from the harassment and free-for-all atmosphere of dystopic future Tokyo. Years later, still living as a boy with her older brothers (but without their parents, as they were killed), Tsukasa gets involved with stone-faced Ryuuji, born and raised as the successor of a yakuza family. Once she becomes his bodyguard, things start to unfold, and even in Tokyo Crazy Paradise, not everything is what it seems... ~Chapter 110