|School||Seiso Academy Music Department|
|Grade||First Year Class A|
|Physical and Vital Statistics|
|Manga||Volume 1 Chapter 1|
|Anime||Season 1 Episode 1|
Keiichi Shimizu (志水 桂一) is a first year cellist in the music department, whom is known across the school for being a sleepy bishonen and a cello prodigy. Keiichi is often found passed out on the ground with a book and his cello. Keiichi tells Hino that he finds so much joy in playing his cello, striving for the perfect, most wonderful sound that he closes his eyes when he practises and when he opens them again it's morning. Keiichi also enjoys visiting the library to study music and famous composers, as well as going to concerts to hear other peoples music being performed. Keiichi is enticed in his own world with his cello, but soon falls in love with the sound of Hino's violin. Despite mistakes he says that when Hino plays the violin, it has the sound of honesty and straightforward feelings, in contrast to his text book performance.
Keiichi is the youngest male competitor in the concours. He likes to do things at his own pace. He is very drowsy all the time and often seems confused or in a daze, shown when Keiichi instead of Mr. Kanazawa says Mr. Kanadawa or Mr. Kananagawa. Keiichi speaks slowly and politely, in a quiet voice, and can be found sleeping anywhere, anytime. Kahoko first met him lying on the ground, fast asleep because of this many people gave him the title of "Sleeping Beauty" from his handsome face and drowsy manner.
- His favorite food is rice balls.
- His hobby is naps and speculating.
- He plays the cello