Hayama, Umi

羽山海己

A second-year student, just like Wataru. She is Wataru's childhood friend. She is skilled at cooking and prepares breakfast, lunch, and dinner for the residents of the Tsugumi Dormitory. She has harbored a secret crush on Wataru since they were children, but he seems not to notice.
When Umi was a child, she was very shy. She lost her mother when she was little. She dislikes being alone and always stuck with Wataru when they were young. She goes almost everywhere with Wataru. Some people dislike Umi and her father for special reasons.