Confidential Money ~300-nichi de 3000-man Dollar Kasegu Houhou~

The story starts in New York when an invitation letter from a mysterious figure called ‘John’, made its way into the hands of the heroine and six other males. The letters all bear the mysterious message: 'You have gained the right to win big money.' After that, following John’s instructions, they joined together to form CM7 (Confidential Money 7). With six individualistic members, the heroine, Natalie, work together to seize the business's off-the-books $30 million, and gradually, bridge the gap between their hearts.

[From Konnistique's Tumblr]