Kemopani!

Nagare Kouyou (the protagonist) is a student attending a modern-style school. He was appointed as the vice chairman by his childhood friend and class president, Kijouin Minao, and led a school life like a servant. However, one day, he was burdened with the care of a transfer student, Masudo Mou Manami, who had animal-like ears growing on her head. Although the only visible difference was her animal ears and tail, her behavior was always unconventional and unreasonable. "I appointed her, so if she doesn't do it properly, my evaluation will drop!" scolded by Minao, but disciplining Manami was a difficult task... [Translated from DL.Getchu]