Kakegurui Compulsive Gambler Graphic Novel Volume 04

The Student Council President is away, and the rest of the council will play... Yumemi Yumemite is a super popular idol who's a big hit in the indie scene. Not only is she a student at the Hyakkaou academy, but she's also a member of the student council?! How will Yumeko do in a gamble with an idol?