Usotsuki Ouji to Nisemono Kanojo  

The Liar Prince & His Fake Girlfriend, The lying prince and the fake girl., 嘘つき王子とニセモノ彼女

Narumi Luna is a high school student who desires companionship but her stern demeanor prevents others from approaching her. After saving a black cat from being mistreated, she faces eviction from her residence. With no alternative, an unexpected meeting with the popular students at her school alters the trajectory of her life.