Hinayama Yumeno

First-year student at Yukyu Academy and classmate of the Izumi sisters. Calls the protagonist Brother. Due to her puppy-like nature, she's so cute that everyone wants to pat her on the head. Bright and energetic. When she gets competitive with Chinatsu, she tries to act sneaky, but it never works out because she's easy to read. Loves her real brother and always brags about him to Chinatsu.