Ookami shoujo to kuro ouji (2014)

Shinohara Erika is a first year of high school student. While talking to her popular friends, she makes up a story about her "boyfriend." But In reality, Erika doesn't have a boyfriend. Erika's popular friends soon begin to doubt her story and Erika is also running out of lies. Erika then sees a handsome boy on the street and takes his picture discreetly. She later shows his picture to her popular friends as her boyfriend. The boy in the picture is Sata Kyouya and happens to attend the same school as Her. She tells Kyouya about her situation and asks him to pretend to be her boyfriend. Even though Kyouya has a pretty appearance, he has a side no one knows about.