A college student who moonlights as a rental girlfriend for the Diamond company. On campus, she goes under her real name Chizuru Ichinose, and utilizes a nerdy appearance with large dark-framed glasses and braided pigtails. It is later revealed that Chizuru and Kazuya are next-door neighbors in their apartment complex. She continues to let Kazuya rent her services to help his grandmother Nagomi and to help him get over his breakup with Mami.