Sawa is a nice, warm hearted 15 year old girl who always tries her best. She applied to to her new high school, Amawa Gakuen, because she liked the uniform. On her first day, she meets Akira Nagashima who tells Sawa that Amawa Gakuen used to be an all boys school. Sawa then meets Ran Matsuyuki, who she thought was a nice person, but starts hating him afterwards. However, Sawa and Ran later become pretty close, and they even start dating with each other. She is a Pisces and her blood type is A. Akira is her unofficial best friend, but Sawa is also good friends with Yuri Shirakana, Ran's ex-girlfriend from Eika Gakuen.During the recent chapters, she is in an argument with Ran but they had stopped the argument They decided to break up for the time being.Sugishita and Sawa had started dating, but after that,Sugishita had broken up with Sawa because of some reasons, but Sawa was really thankful for the days when Sugishita was with her.Currently in the recent chapter, there might be a possibility that Ran and Sawa might be together again.

Ran seems to be the "leader" among his friends in their class. His Father, the Chairman of Amawa Gakuen, has high expectations for Ran. His mother was the one who helped him get through his father's demands, but when she died, Ran jumped off the roof in middle school attempting to commit suicide. He didn't die however, but suffered some injuries. Ever since then, his friends have always been watching out for him. Despite how rude he seems to be towards Sawa in the beginning, he shows hints along the way that show he really cares about her. He shares a kiss with Sawa on his birthday, July 18th. They start dating later.
He is currently in an argument with Sawa, and they decided to break up for the time being,Ran realised that he really liked Sawa and in the recent chapters, there might be a possiblity that they would be together again.

Akira is Sawa's unofficial best friend. Akira is always there giving her friend gossip and stories from the past and present because her goal is to be mangaka. Akira says her intentions of transferring to this new co-ed school are because there is a lot of "good material" there. Although it seems like she doesn't care about Sawa at times, she really likes being around her new friend. After Sawa and Ran start dating, Akira gets mad at Sawa, saying that Sawa was actually like the girls she knew at middle school- they didn't actually care about Akira and they made fun of her. Sawa proves that she liked Akira as a friend, and now they are okay. Akira seems to have feelings for Tsubaki, but she has a hard time showing them. In an omake, Akira states that she doesn't like to get into troublesome situations.
In recent chapters, Taguchi confessed to her, but Akira rejected him since she had feelings for Tsubaki. She confessed to Taguchi that she liked him, but Taguchi says that he doesn't want to date anyone for the time being. Then..

One of Sawa's classmates and Ran's closest friends. He is Ran's best friend and is one of the firsts to be aware of Sawa and Ran's relationship. He was in the basketball club with Ran and Kido until the third quarter of their second year of middle school. Tsubaki is very caring of Akira. In an omake, Akira reveals that he has two older sisters (it was inside her notepad of research). He is number two on the list of people Akira can't handle, right behind Sawa. Tsubaki wears round glasses.

In chapter 25, he tells Akira that he is in love with Sawa, but he also likes her. Tsubaki is upset at the fact that Sawa and Ran are in a fight since he said that if Ran were to be with another person, it will be okay if it's Sawa.

One of Sawa's classmates and Ran's closest friends. At first, he was mean to Sawa along with his other friends, but defended her with Ogawa after their gym teacher hit her and pushed her to the ground. He was in the basketball club with Ran and Tsubaki until the third quarter of their second year of middle school. After he and his friends went to Sawa's house for a study party, Kido discovers that he actually had feelings for Sawa. Kido was originally unaware of Sawa's relationship with Ran, but finds out later on the series.

One of Sawa's classmates and Ran's closest friends. His family owns a beauty parlor called "Hairsolon Brook," therefore, he always has perfect hair (Stated by Sawa). He has an older sister. At first, he was mean to Sawa along with his other friends, but defended her with Kido after their gym teacher hit her and pushed her to the ground. He usually wears a bandana on his head and has his lips pierced. He was in the soccer club with Taguchi until the third quarter of their second year of middle school.

One of Sawa's classmates and Ran's closest friends. He wears the square glasses. He understands Akira's feelings since he was like her when he was in middle school, but the reason why he isn't antisocial now is because Kido and the other boys kept on pushing themselves to be friends with Taguchi. He was in the soccer club with Ogawa until the third quarter of their second year of middle school. He tells Sawa to keep on pushing herself until Akira accepts her.

In recent chapters, Taguchi confessed to her, but Akira rejected him since she had feelings for Tsubaki.

Ran's kind and beautiful ex-girlfriend who is popular with boys. Yuri was the one who asked Ran out, but dumped him because he didn't act like he loved her. She appears in chapter 7 when she visits Amawa Gakuen to help plan the inter-school Culture Fest with Eika Gakuen. She told Sawa that she joined the student council since she will be able to visit Amawa Gakuen as much as she wants since still likes Ran. When Yuri asks Ran out again, he rejects her because he has someone he likes already. Yuri becomes sad when she realizes that the person Ran likes is Sawa, but she got over it and is good friends with Sawa now.

He makes his first appearance on chapter 17. He's a part-time model who transfers to Amawa Gakuen into Sawa's class at the start of the new semester. He observes the problems with her relationship with Ran and as the story progresses, he shares a kiss with her while Ran appears in front of them. He asks her to be his girlfriend later on and eventually, they start dating.But due to some reasons, they had broken up.

Good guessing~! Yup, it's definitely their love child! He (or she?!) makes an appearance in the last chapter.