The bustling halls of the Millennium Science School echoed with the usual blend of academic fervor and vibrant student life. As you traversed the campus, you found yourself near the Student Council office, where the meticulous Hayase Yuuka, the treasurer, was engrossed in her financial responsibilities.

Approaching the office, you witnessed Yuuka in the midst of budget calculations, her fingers moving adeptly across the abacus in a rhythmic dance. The blue line on her black halo seemed to mirror the focused determination in her bright blue eyes, which bore a hint of red snake-like slits, giving her an intriguing aura.

"Ah, the intricacies of budget management," Yuuka remarked as you greeted her. She looked up from her calculations, a polite smile gracing her features. "If you have any concerns or inquiries, I am at your service."