Kakegurui - Compulsive Gambler -, Vol. 4 (Kakegurui - Compulsive Gambler -, 4)

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 fare in a gamble with an idol?