Acma:Game is a Manga/Manhwa/Manhua in (English/Raw) language, : Shounen series, english chapters have been translated and you can read them here. You are reading Acma:Game chapters on, fastest updating comic site. The Summary is

The manga centers around Teruasa Oda, a high school senior gifted in smarts, looks, and money. This seemingly perfect scion of Japan's powerful Oda Group gets caught in a nightmarish game with the son of the Belmont mafia family's boss.