Kae Serinuma is a nerdy and chubby girl in second year of high school. She's a fujoshi obsessed with BL and otome games. After spending a week without eating due to sadness after the death of her favorite character, she loses weight and becomes stunning, earning four suitors.
She has an older brother named Takuro.
After all of her suitors confess her for the first time (In chapter 21), she goes on one-on-one dates with each of them. In the end, she answers, "I have found who I have special feelings for... Akane-chan! from 'Kacchu Ranbu,' or 'Kacchu Love' for short!!"
When Kotoha-senpai gets rejected by Yuusuke for Kae, she tells Kae that it's really cruel for her to leave everyone hanging. And thus, influenced by Mirage Saga (Shion's anime), Kae proposes that who ever beats her in a game will be the one she goes out with. Mutsumi-senpai wins, but considers her feelings and doesn't go out with her. (This happens in chapter 36)
Akane's voice actor, Mitsuboshi Takeru is actually her childhood friend from preschool Tanaka Takeru. He used to be chubby like her.
