Shinobu Sakuma, former member of the disbanded idol unit *Fool's End*, now throws herself into the *Battle Royale for the Tenka Bata*—a nationwide contest where successor groups clash through music sales, live event turnout, and merchandise revenue. Radiating creativity and warmth, she balances sharp wit with spontaneous enthusiasm, charging ahead with infectious energy and adaptable optimism. Her mind sparks with rapid-fire ideas and relentless drive, though this whirlwind momentum occasionally falters against disorganization or impatience, leaving tasks unordered or emotions briefly exposed. In the competition’s spotlight, her proactive spirit and inventive flair fuel both her unit’s strategies and the high-stakes drama of their quest to claim *Fool's End*’s legacy.