Mashiroiro Symphony: The Color of Lovers

One night on her way back from shopping at Kagami Mall, Sakuno Uryū gets lost and she calls her older brother Shingo to come find her. With initially no luck in finding her, and with her cell phone battery nearly dead, Sakuno gets help from a girl passing by, who offers to call Shingo. Shortly afterwards, Shingo meets up with Sakuno and the girl who helped her, Airi Sena, in a nearby park. Shingo, Sakuno and Shingo's friend Hayata Mukunashi, who attend Kagamidai Private Academy, are three of the students chosen in a group to take part in a temporary ten-month transfer to Yuijo Private Academy, which until now has been a prestigious all-girls school. Upon entering the school grounds, they meet Angelina Nanatsu Sewell, a student and maid at the school. Airi forcefully brings her mother and principal of the school to meet the group from Kagamidai, who were waiting for her arrival.

After Airi's declaration the previous day, a gloomy atmosphere develops among the Kagamidai students. Shingo realizes that Airi is the only one who can change the current mood at the school. Angelina likes the idea of there being more students around to serve, and one of Angelina's friends, Sana Inui, is also for the student transfer. Shingo makes several mistakes while at school, such as walking into one of the bathrooms with Airi inside, or opening the door of a classroom where girls are changing back into their school uniforms after gym class, which infuriates Airi. During lunch, Shingo meets Miu Amaha, a friendly third-year student who is looking after a strange cat-like creature she has named Pannya. Since there is still much opposition about the male students attending, the principal has them take classes in cooking, learning music, preparing tea and flower arrangement.

Shingo cannot initially get the hang of being a class representative and continues to irritate Airi. Despite Shingo trying to be friendly with her, she makes it clear that she will not be getting along with the boys, and she tells him to leave her alone. Later that night at school, Shingo again encounters Pannya, who leads him to a shed outside with Miu inside. She explains that this is the Nuko Club, which cares for injured animals before releasing them back into the wild; Pannya is one such animal. Miu asks Shingo to join the club. Shingo starts to get used to being a class representative and becomes faster at finishing the work. One evening, Airi has to leave early for a personal matter, and Shingo offers to do the rest of the work by himself, if she will tutor him for the upcoming tests. Airi accepts his proposal, despite her objections.

Airi reveals to her friends that she has been living alone since she entered Yuijo and does not have much money to spend on living expenses. On the way back from the supermarket Shingo and the others stop by Airi's apartment and everyone helps to make dinner. Airi asks them to keep her living situation a secret so as to maintain the way students see her at school. The next day, Airi eats lunch Shingo and the other girls. Airi keeps her promise with Shingo and helps him study for the upcoming tests, as well as Sakuno, Angelina, Miu and Sana. Another day when they are over at Airi's apartment studying, Shingo and the girls celebrate Airi's birthday. While spending more time with the others, Airi begins opening up to them more. After the tests are finished, Airi begins addressing Shingo without the use of honorifics, and Shingo does the same for Airi in return.

Airi realizes her growing feelings for Shingo and she wants to confirm that she feels differently around Shingo compared to other boys. Shingo overhears that the principal is thinking about abolishing the Nuko Club because of complaints from various students. Due to Shingo's constant helpfulness, Angelina starts to see him as her rival in being a maid. When they accidentally bump into each other and her headband is knocked off, Angelina starts to cry and acts very childish. Later, Shingo goes to check up on her and she remarks how he is so attentive and considerate of others. The next day, Angelina runs around school looking for ways to help, but she has no luck in finding any work to do. Airi notices Angelina's downtrodden attitude and goes to cheer her up. In doing so, Angelina runs after Shingo and asks him if he would be her master.

Angelina goes with Shingo and Sakuno back to their house, only to find they have all the household chores covered. Sakuno and Angelina both cook a meal for dinner, and Angelina tries to be as helpful as possible to Shingo later on. Shingo joins the Nuko Club and assists Sana posting member recruitment posters around the school. That night, the principals comes to tell Angelina the student council president is having a hard time without her, and Angelina happily returns to the academy, though she still considers Shingo to be her master. The recruitment posters are taken down and most of them are burned. To help save the Nuko Club, Sakuno and Angelina join and help in the recruitment of a sixth member, which would save the club from abolishment. Shingo and Airi get wet from the rain on the way home, and Airi suggests Shingo come to her apartment to get an umbrella. Airi wants him to take a bath before he leaves, though Shingo is reluctant to take one before her.