With their dream of entering an all-girls high school approaching, Eriko, Yuma, and Ayano decide to explore the school during spring break. There, they encounter the harsh reality of all-girls high school. There, they encounter Koda, Himeji, and Ogawa, who are all current students. Koda and the others mistake Eriko and the others, who are wearing high school uniforms, for seniors. Unable to back down, Eriko makes up stories about "high school life at Saki Girls' High School"...

Eriko and Yuma are relaxed about their first physical examination since enrolling at Sakijo High School, while Ayano is a bit delusional. However, when Koda and the others tell them about the physical examination at a girls' high school, they are told that they are required to wear only panties and a cape! What's more, they are asked to go around each examination venue in these attire for an "in-school orienteering"! Eriko, feeling down, proposes a competition to see who can go around the whole thing the fastest, but...

The Idiots, jealous of the fact that Himeji has a boyfriend, have Himeji set up a mixer. On the day of the mixer, the guys are taken aback by Eriko and the others' high spirits and just smile politely. However, Ayano and the guy Shimotakaya, who are both interested in each other, enter their own world. With Eriko and the others dumbfounded, the two believe it's fate and start dating...

It's Yamasaki Girls' Private School Sports Festival. Eriko and the other six get excited after Odagiri promises to buy them ice cream if they win. Then, things heat up even more with the arrival of Saionji, Koda's rival. They do very well in the events they participate in, including the ball tossing contest. Despite losing by a narrow margin to the Red Team, Eriko and the others aim to make a comeback in the second half, but...

On her way to school, Eriko is captivated by a beautiful, idol-like girl who picks up her dropped handkerchief. That day's swimming lesson is held at the nearby Shimomura Junior High School pool, as the swimming pool is out of order. After the lesson ends safely, as Eriko and her friends are about to return to Sakijo, a student from Shimomura Junior High approaches them. It is the beautiful girl Eriko met that morning...!

Suspected by Ayano of spreading false rumors and trying to ruin her relationship with Shimotakaya, Yuma rushes out of the classroom and calls her sister Momoka. After school, the Idiots meet Momoka again. However, only Eriko sees through Momoka's lie and believes Yuma. Hearing this, the Idiots rush out of the store and head to Yuma to apologize. Eriko is still worried about Momoka...

Odagiri and Matsuo call out to Eriko and her friends as they arrive at the pool. Eriko and Yuma, who have discovered a weakness in the two teachers, decide to join them in relaxing. In the evening, Ayano and the others join them and the six of them head to an amusement park. Meanwhile, Koda is preparing for her "actress audition." The venue is the same amusement park as Eriko and her friends...!

Summer vacation is over and the second semester begins today. Eriko, Yuma, Koda, and Ogawa are in the classroom when Ayano brings a photo of Eriko, Yuma, and them from their first year of junior high school. Eriko and the others then start talking about when they first met. Koda and Ogawa are surprised by this unexpected past. Then Ogawa pulls out a photo of the three of them, Koda, Himeji, and them from their junior high school days, and the three of them start talking...

Koda sighs, gazing wistfully outside. Eriko, who has been watching him, tries to talk to him, but he glances at her and leaves. Eriko is worried that Koda seems different from usual. Just then, Eriko receives a call from her younger brother Daichi on her cell phone saying that he has been injured, so she rushes to the hospital. The two are glad that his injuries were minor, but then they see Koda entering the examination room...

Ayano is engaged in anachronistic love talk with Shimotakaya. Her mother, Choko, and older sister, Fumino, are shocked by what they see and begin questioning Ayano about Shimotakaya, ordering her to bring him home and introduce him to the two of them. The next day, Shimotakaya visits the Sato household looking nervous and dressed in an unfamiliar blazer. His mother and older sister bombard him with questions and make harsh remarks...

Eriko comes into the classroom cheerfully, with a new hairstyle and perfume on. The Idiots are puzzled by the unusual Eriko and interrogate her, finding out that she has a class reunion. Eriko then tells everyone about a love story she had in elementary school. Yuma and the others are convinced by her story and after school put Eriko's plan to turn everyone into girls into girls into reality goes into motion, but...

Tomorrow is the annual school festival. Eriko and the other members of the Bamboo group are planning to open a maid cafe. On the day of the festival, most of their classmates are absent. But the Idiots are still fired up and motivated. But no customers are coming. The reason the Bamboo group isn't getting any customers is because of the Matsu group's maid cafe. And she has cat ears, too. The angry Idiots glare at Saionji and propose a sales competition between the Bamboo group and the Matsu group...