The Fast Track to Elegance!

Sakuraba Sakurako is at the entrance ceremony of Neo Mogitori Academy, a school for training young ladies. She tries to enter the school with a dog as her companion, but the teacher stops her and she ends up fighting the dog. Sakurako narrowly wins the battle and meets the boys and girls who will work hard together to become the ultimate ojou-sama.

(Source: Kadokawa, translated)