Tsuchiura

Tsuchiura is a second year as well as Kahoko's friend. He and Kahoko met after he ran into her, nearly knocking her down a staircase, saving her just in time in episode 1. Their friendship eventually grows, and she even confesses to him that she knew nothing of playing the violin.
He is a very gifted pianist but quit playing in public because of an unpleasant experience at a competition because of the judges’ discrimination of younger contestants. After he assisted Kahoko in the first round of the concours by being her accompanist, he, as well, joined the concours.
In the past, he had a girlfriend called Mizue Sakamoto, and in episode 14, they met again by accident at the train station with Kahoko and Tsukimori.
Tsuchiura is the star of the soccer team; he is the team midfielder. He is very skilled at the sport and even outdoing some third year students. Even so, Mizue said that he was skilled in both basketball and soccer, which Mizue points out that whenever he plays, there will always be girls cheering for him. As told by Mizue, he is also in the basketball club when they were in middle school

.
He does not like Tsukimori, and they often get into many disagreements. One of their arguments can even start from a notebook to their style of performance.
His feelings for Hino gradually deepen as the series progresses and going as far as secretly calling her Kaho during the quintet’s performance.
His mother is a piano teacher, revealed through Minami's conversation with Kahoko in the anime. He also has a younger brother and is good at cooking.
In Chapter 37 of the manga, he admits to his ex-girlfriend, Mizue, that indeed, he likes someone - that someone being Hino, to whom he is thankful because she was the one who had helped him rediscover his love for the piano.
Later on in Chapter 55, in an attempt to make Tsukimori realize his own feelings for Hino, Tsuchiura confesses, "I ...like Hino."