Rent A Girlfriend Vol 1

Rent-A-Girlfriend by Reiji Miyajima. A Romance manga rated Older Teen, published in English by Kodansha.

After getting dumped by his first girlfriend, college student Kazuya Kinoshita uses an app to rent a date. His rental girlfriend, Chizuru, seems perfect, until a series of lies leaves the two of them pretending to be a real couple in front of their families.