Sumi Sakurasawa

A rental girlfriend affiliated with Diamond. She is Chizuru's junior and the same age as Chizuru. Her birthday is March 20th. She is 156 cm tall and a first-year student at Mizujoshi University in Futaba. She is characterized by her cherry blossom-colored hair and slightly thick eyebrows. She dreams of becoming an idol. She is from Ibaraki.

She likes Japanese history and is not good at communication. She is extremely shy and struggles with conversation, so she started working as a rental girlfriend to change herself. However, due to her aforementioned personality, she received complaints from customers, leading her to practice dating with Kazuya at Chizuru's request. Encouraged by Kazuya's words, "There's no way a kind girl isn't suited to be a rental girlfriend," she is gradually growing as a rental girlfriend.

She develops feelings for Kazuya, who encouraged her, but due to her reserved nature, there has been no progress. She is the protagonist in the spin-off "Kanojo, Hitomishirimasu."