During a rainy night in Shizuma's villa, Nagisa finally learns about Kaori Sakuragi, the Etoile that died. However, she also makes a painful discovery of exactly how close the two Etoile were, and how their shared past is still far from being a mere memory.

While all three schools eagerly await the election of a new Etoile couple, Nagisa learns the truth behind this tradition and receives an unexpected invitation from Shizuma in order to find out more information about Shizuma's late partner—the deceased Etoile.

While everyone is still preparing for the show, there seems to be some internal struggling concerning Kaname and Momomi with the others. Later, after suffering two show-stopping events, all the students involved with the play band together and put on a show the other students will never forget.

Everybody at the Strawberry Dorms is pitching in for the two plays in Astraea's Drama Festival. The main play, Carmen, is the focus of everyone's attention as everyone awaits the announcement of who is to be cast as the lead roles. The second play will be Romeo and Juliet, prompting a furious rock-paper-scissors and thumb war tournament between the second-years for the role of Romeo. Tamao is asked to write the script for the performance of Carmen.

Yaya's incident with Hikari causes her to fear that she has lost Hikari forever. An effort by Nagisa and Tamao allows them a reconciliation and another chance at being best friends forever.

Hikari finally gets a chance to be on a "date" with Amane. However, Kaname and Momomi again try to tear apart the new bond between them for Spica's sake at the Etoile position. In the midsts of all this, Yaya's feelings for Hikari grow even stronger, and she eventually vents them by suddenly kissing a shocked Hikari.

The month-long summer holidays have started, and most of the students residing in the Strawberry Dorms are going home. This leaves Nagisa, Shizuma and a couple of others left behind. Without the interference of other students, Shizuma makes her move on Nagisa.

Nagisa, accompanied by most of her friends, go on a short trip to the beach during "summer school". While there, everyone finds their own ways of having fun with each other, and they even get to participate in a test of courage later on. Meanwhile, Nagisa is just starting to discover just how much she misses Shizuma.

Nagisa starts to prepare for the mid-year exams by getting tutored by Shizuma in French.

The "Seven Mysteries" of the Strawberry Dorms are mentioned. Nagisa and Tamao start to investigate the first mystery: "The Girl of the Hallway", despite Nagisa's terrible fear of the supernatural.

Nagisa offers her favorite umbrella to Kagome but does not give her name. Later, Kagome gets help from Chikaru and her friends, and they start to try to find out who gave Kagome the umbrella. Meanwhile, Tamao tries desperately to fulfill her fantasy of walking under an umbrella together with Nagisa.

As Hikari and Amane's relationship progresses, Shion tries to convince Amane to run for the position of Etoile in the next election. However, unknown to Shion, Kaname and Momomi work out a different plan involving Hikari.

Nagisa tries to find a club she would like to join, but she's not interested in any of them. Later, she discovers the Etoile's private greenhouse and helps with the flowers.

Select first years attending Miator become room-temps for older students. One such student, Chiyo, becomes the room-temp for Nagisa and Tamao.

Hikari recalls being transferred to Spica a year prior and the first time she saw Amane riding her horse, thinking she was like an angel. Hikari and Yaya, her friend and roommate, sing in the St. Spica choir and practice for the congratulatory ceremony for the return of Amane and the rest of the horseback-riding team. Hikari, who is extremely nervous for the event, prays alone at a fountain for a good performance. She and other Spica students gather to see Amane’s return, at which time the Etoile presents Amane with a bouquet of roses for her accomplishments. At the ceremony, during the choir performance, Hikari accidentally starts singing early due to her nervousness, and becomes embarrassed. Amane stands to quiet the room and the performance progresses without Hikari’s participation; she is extremely disappointed in herself.

Nagisa is shown around the Strawberry Dorms by Tamao and two of their classmates, during which time Nagisa is surprised by Shizuma yet again, who continues to make advances; Nagisa realizes that she finds herself unable to move whenever Shizuma gazes at her. Shizuma retreats to avoid members of the student council. Later, Nagisa accidentally bursts into a student council presidents’ meeting in the midst of an argument over the Etoile’s continued absence. Lulim's student council president, Chikaru Minamoto, tells Nagisa that her interruption was a relief because it ended the argument regarding Shizuma’s absence early. She explains some responsibilities of the Etoile that Shizuma is shirking as well as some major differences between the three schools, explaining arguments between the other student council presidents.

Tamao invites Nagisa to the Literature Club where she recites a poem she wrote about a rainbow. Shizuma misses an important lunch discussion. Nagisa and Shizuma have a couple chance encounters; Nagisa runs into Shizuma in a hallway where Shizuma flirts with and attempts to kiss her before being interrupted by the toll of a bell, and Nagisa later finds Shizuma with a young Miator student. After the latter event, Nagisa retreats to the library, and Shizuma follows, catching her and again attempting to kiss her before being interrupted. The Miator student council president scolds Shizuma for her behavior toward the new transfer student and for shirking her responsibilities as Etoile, but Shizuma brushes it off.

Nagisa Aoi transfers to St. Miator Girl's Academy and gets acquainted with the school and fellow students, including Tamao Suzumi, her friendly (if somewhat overbearing) roommate, Miyuki Rokujou, the Miator student council president, and Shizuma Hanazono, the Etoile, whom Nagisa finds beautiful and intriguing but also frustrating and perplexing due to her forwardness in her advances.