Suou Ginta is a cool high school student, who is on the tennis team. He is very simple minded, but tries very hard at whatever he does. Ginta's blood type is O, and his sign is Aries. His birthday is April 10.

When Ginta read Miki's confession letter in junior high school, he was surrounded by his friends. So he had no choice but to say that he didn't care about Miki. But he really loved Miki.

Akizuki Meiko is a quiet, intellectual high school student, who is in the literary club. Meiko's blood type is A, and her sign is Scorpio. Her birthday is October 28.

Meiko was Miki's best friend since junior high. They were classmates in high school, and they always exchanged diaries to talk to each other.

Suzuki Arimi is a very cheerful, persistent, determined, and sometimes sneaky high school girl. She goes to Sakaki Gakuen. Arimi's blood type is O, and her sign is Leo.

Arimi went out with Yuu for three months while they were in junior high. Since it was a three month deal, they broke up right afterwards. But Arimi couldn't forget about Yuu and still loved him. Arimi was a very popular girl and had many boys after her, but she only wanted Yuu.

Miwa Satoshi is the president of the student council in Miki's high school. He is very smart and very handsome. Satoshi's blood type is AB, and his sign is Sagittarius.

Satoshi always played around with girls, but he was seriously interested in Meiko. He kept going after Meiko, but Meiko didn't want anything to do with him.

Rokutanda Tsutomu is Ginta's cousin, and is a high school student of the same age. Tsutomu's blood type is B, and his sign is Cancer.

Tsutomu loved Arimi ever since they were little, although she didn't like him.

Sakuma Suzu is a junior high student, but she is also a famous model. Suzu is Miwa Satoshi's cousin. Suzu's bloodtype is B, and her sign is Libra.

Suzu liked pretty things, and she liked to take pictures of them so she can see them any time she wanted. She thought Yuu was pretty and started falling in love with him.

Since Suzu wasn't very good in math, she had Yuu come over to her house to tutor her. She didn't like Miki and tried to take Yuu away from her.

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Tsuchiya Kei was a talented pianist, who worked at the ice cream store where Miki worked. Kei's bloodtype is AB.

Kei's parent forced him to play the piano too much and Kei rebelled by running away from home. He said that he would never play the piano again. But deep down he loved the piano.

Kitahara Anju  is a calm, quiet, cute high school student, who was a childhood friend of Yuu. Anju's bloodtype is A.

Anju met Yuu when they were 12 years old. They became friends and played together a lot. Then Anju moved away, and they didn't see each other for 6 years. When Yuu came back from his trip to Kyuushuu, Anju met him on the platform of the train station.

Yayoi is a very sweet girl that Tsutomu prays for in the New Year's episode. He prays for a girl 100 times prettier than Arimi and shortly runs into Yayoi. He takes one look at her and calms down from the fit he was having. She is lost and looking for her friends. He offers to help her. In no time, her friends find her and she leaves. He forgets to get her name, school or address. He is heartbroken. Yayoi shows again in the Valentine episode where she is jilted by a potential love interest. Tsutomu accidentally overhears this and comforts Yayoi. He is actually gentlemanly in this episode! She shows up again in a few more episodes, usually as Tsutomu's date. She seems to not notice all his flaws. Guess this is true love, huh?