ふたりじめアンダードッグ

When he was the son of a rich family, Mutsuki Shirosaki was not a very great guy. Especially not to a pair of down-on-their-luck twins that he forced to obey his ridiculous demands. Now that Mutsuki's barely scraping by in life, a couple of popular, attractive models waltz into his life with a job offer that's too good to be true - he just has to obey his new masters...and do what, exactly? (Source: Futekiya) Note: Includes two extra chapters.