Sana Hidaka

Seiyuu: Shinnosuke Tachibana

Sana is the main protagonist of the series. He left Sakuranomori during his childhood, and during the beginning of the series he comes back to live by himself in the apartment building owned by Aoi's parents. He apparently had a crush on Nanaka before he left and still holds those feelings for her. He used to play the piano, but he forgot every song except the song Nanaka wrote for him which he says is very important to him. He has a fear of blood and knives due to having attempted to commit suicide when in middle school by slitting his wrist; he uses a watch to cover the scar. Ten years after the events of the main story, Sana proposes to Nanaka.

Nanaka Yatsushiro

Seiyuu:Ami Koshimizu

Nanaka is one of Sana's friends, and seemed to have feelings for Sana. When Sana returns to town after five years, her personality has completely changed from sweet and caring to a cold demeanor, and moody. When she meets Sana again after he returned she slaps him for apparently not knowing who she was. She still seems to have romantic feeling as she gets jealous whenever Sana is with another girl (especially Asami). During one encounter after school, she accidentally hears Sana playing the half-finished song that she wrote for him five years before at his leaving party. She seems shocked, yet happy. Sana gave her a sakura bracelet during a summer festival when they were kids, which she still treasures years later.

After the fishing and bathhouse trip, Sana gave her a pink seashell that he found at the river. She was very happy to know that she was the only one that received the seashell, in comparison to the same compact mirror that Sana had bought for Nanaka and Asami. Nanaka was a victim of possible arson shortly after Sana left Sakuranomori, and lost both her parents during the fire; she managed to escape the fire with only her violin and the sakura bracelet Sana gave her. Since certain parts of the event were unknown to her, she was placed as the main suspect of the event, causing her current cold and moody demeanor.

She eventually comes to remember about the fire. She recalls that she overheard her father say that her violin teacher was her birth father, of which she had trouble believing since he had just died of cancer. That night, her non-blood-related father killed Nanaka's mother and burned his house down with the intention of killing himself and Nanaka. Due to remembering, Nanaka tries to commit suicide by slitting her wrist, but Sana finds her and manages to save her life. Ten years after the main story, Nanaka is proposed to by Sana.

Aoi Oribe

Seiyuu:Tomoko Kaneda

Aoi is Sana's cousin and her parents own the apartment building that Sana lives in. She prefers to be called Aoi-chan instead of Aoi-san, despite the fact that she is a year older than Sana. She wears glasses and has a busty physique. She loves to read books and is very energetic and clumsy. She has a very high-pitched voice and child-like character. Despite being childish, Aoi has a very caring personality, and never fails to aid a friend in need.

Syusuke Wakatsuki

Seiyuu:Takehito Koyasu (regular), Y?ko Sanpei (childhood)

Syuri Wakatsuki

Seiyuu:Yukari Tamura

Syuri is one of Sana's friends since childhood, and is the older twin of Syusuke Wakatsuki. Yuzuki refers her as the head of the Wakatsuki twins. She can be seen as the most athletic of all the girls, although she is somewhat lacking when it comes to her figure. Despite her sporty physique, Syuri is still a very supportive friend that had no trouble connecting with Sana, even after his prolonged absence. She was also the first to be a volunteer at the old folk's home before inviting Asami.

Asami Hoshino

Seiyuu:Mai Nakahara

Asami is a friend of Sana's and is in her second year. Sana met her when he got ditched by Nanaka when they were supposed to go to the student council meeting together. Instead, Asami agreed to take him there and led him into the correct classroom. Asami seems to have a very gentle personality, and even volunteers at an old folk's home; she often asks Sana to come too, who is happy to oblige. However, she actually has a very vindictive personality and will go to great lengths in order to get even with someone who hurt her. In an anime-original plot, she once confessed her love to Syuri in her first year of high school, but was rejected by her; in effect, Asami hated her for some time since Syuri continued to be her friend as if nothing had happened.

Hinako Mochida

Seiyuu:Ayumi Murata

Hinako is ten years old at first but becomes eleven in the course of the story. She is in love with Syusuke from when he saved her from three bullies who took her bag and would not give it back. She seems to want to learn how to be the girl he will like and asks Sana and Aoi for help. Hinako has a personality comparable to Aoi's, however being only in the fifth grade, she is childish as a result of her age. Hinako finds it hard to understand the age difference between her and Syusuke and is rejected by him. Despite this, her resilient character is the culprit for her frequent comebacks.

Yuzuki Fujimura

Seiyuu:Megumi Toyoguchi

Yuzuki is the twenty-five-year-old homeroom teacher of of Sana's class; Syusuke, Nanaka, and Syuri are also in the same class. Whenever her students do a good job in school, such as cleaning a classroom thoroughly or bringing things to the teacher's lounge, Yuzuki will give them a piece of caramel candy, and even though she says to keep it a secret, everyone already knows that she does this. Many years ago when she was in high school, she met Sana as a child at the park and gave him one such caramel candy for trying so hard at attempting to flip over a metal bar; this is what helped her decide to give them to others.