As Yumeko defeats Midari's challenge, the atmosphere at the school begins to change quietly. Suddenly, the student council president leaves the school. The second-year executives openly reveal their ambitions. And the one who throws down the gauntlet to Yumeko is Yumemite Yumemi, an executive and an idol. Amidst the turmoil, rumors surrounding Yumeko circulate among the livestock. A tale of beautiful girls and school gambling, where they act, dance, and sing, Volume 4.