Ilios

Paris Kameyama, the young leader of the Kamematsu-gumi, attends a party held by Akaiya-kai, Japan's largest fraternal organization, and steals away Elene, the wife of a belligerent gang boss. Furious, the chairman of the Akaiya-kai calls upon Achilles, a man known as "The Demigod," to go after Paris…

(Source: Tonari no Young Jump, translated)