A very popular girl in her final year, and known as the school's Idol. She can be described as picky, innocently insensitive, insecure, forgetful and eccentric. She also has a liking for cute things, especially puppies. Her best friend is Hibiki Tsukahara, a captain of the girls swimming team.
The series follows Junichi Tachibana, a second year high school student from Kibitou High who dislikes celebrating Christmas due to a past incident two years ago when his date stood him up on Christmas Eve which left him heartbroken. The anime adaptation is rather unusual as it is divided into several story arcs where each arc focuses on one of the main heroines who will become Junichi's love interest. The anime is also licensed and released in North America by Sentai Filmworks. A shy girl named Risa Kamizaki confesses to Junichi, which he later accepts and agrees to become her boyfriend, but she wants to keep their relationship a secret. Junichi wants to go the Founder's Festival with Risa and introduce her to his friends, which Risa thinks about it.
She has a teasing and playful nature. She is a very picky person, bit eccentric and quite insecure when it comes to things she likes the most. She also likes cute stuff, especially puppies. Her best friend is Hibiki Tsukahara , the captain of their school's girls' swimming team and the one who tends to berate her. The time of this events only known between her first time together with Junichi for the first time until Christmas Eve.