Nyanpani!

Hinata is a high school girl who is always working on self-improvement. Popular with both boys and girls, she meets two popular upperclassmen at school, Kizuna and Nagisa. Hinata falls in love with the kind and gentlemanly Nagisa, while Kizuna is cold and aloof. Then, one day, she saves a cat, and her exciting school life begins. (Source: Natalie, translated)