Ousai Academy is a former all-girls private high school which has recently been integrated for both genders. Takatoshi Tsuda is pushed into becoming the vice-president of the student council, where he is the lone male member surrounded by three beautiful girls.
Ousai Academy starts a new school year. Suzu's dog, Boa, visits the school. Takatoshi's little sister joins as a first year. The student council gets concerned about improper relationships at school. Another squid scene with Takatoshi where he sprays milk on a model butt. Mutsumi sets up a match with Toki, where Toki would have to join the judo club if she loses.
Some gags about the art pieces in class. Suzu feels under the weather so the council has her rest in the infirmary for the school day. Shino shows Uomi the different locales on campus, but they interpret each place with something sexual. Uomi offers some concerns about the placement of the men's restroom. Aria has a spot on guessing an object based on its silhouette shape. Gags about allergies and mouse pads. Takatoshi makes a poster. The girls ask Takatoshi for tissues. Uomi asks Takatoshi if there's a girl he likes. And a follow-up to the squid episode where Hata is done with her part but Aria shows up.
Takatoshi asks Kotomi to act as vice president while his class goes to Okinawa. Nene has some gags involving her device. Kotomi joins Aria and Shino in morning inspections. As the class tours Okinawa, Hata appears and asks Takatoshi to check on two teachers that seem to be flirting with each other. Suzu gets separated from the group; the students and teachers look for her. When Yokohama freaks out over a display stand for spotted dick, they find Suzu. Shino ponders whether to call Takatoshi. The next day, the class visits a lighthouse and has fun at the beach; Shino, Aria and Kotomi do the same. The class feeds fish underwater while wearing diving helmets. Kotomi asks Shino whether she and Takatoshi are dating, so Shino calls Takatoshi. When Suzu and Takatoshi return they share some snacks they bought.
Uomi appears at the school in Shino's gym clothes, as her own clothes got wet from the rain. She observes the council as they do their activities in the office. Hata interviews them. Shino and Takatoshi walk the halls. Kaede-chan has a segment where she walks the halls and observes each of the student council girls. In the squid segment, Takatoshi is approached by Aria, who then runs away. Nene has a trivia segment about the history of dildos. Takatoshi and the gang study at the library. Takatoshi and Kotomi have to take make-up exams, so they have a study session with the council girls at their house. Aria does a "what is this?" segment; the object is a vibrator. For Golden Week, the council members visit Aria's company amusement park and test the rides. They enjoy a dinner afterwards.
The council members talk about food and the summer weather. An assortment of jokes from the manga. It starts to rain. Hata photographs the council members as they model the new school swimsuits. On the way home, they cut through a park. The judo girls have marathon practice by running into town, but Toki gets lost. A stray cat visits campus. The council holds a send-off assembly for the judo club.
Shino is recruited to become a Japanese idol. She pictures life as one, where she gets along with the staff and does quite well at the tasks given, including modeling and singing at concerts. But when she sees Takatoshi dating a girl that resembles her, she wakes up from her dream and declines the offer. The girls ponder self-defense strategies and take lessons from the judo club. Igarashi is especially worried as it means having to interact with Takatoshi. Aria has another guessing game involving what is going on a steamy car in traffic. In the Takatoshi and Squid segments, Suzu helps Takatoshi clean up. Aria and the other girls are concerned about what they have observed.
Aria and Shino sell an SYD bicycle. Jokes about lettering. The council receives some gifts from various clubs. Shino tries out the different clubs, and finds she is good at everything. Takatoshi and Kotomi pull out a telescope; the council girls join them to look at the stars. The council gets the school swimming pool ready for use. The day of the pool opening, Shino forgets to bring underwear. Takatoshi and Kotomi compare grades. Yokohama has an English lesson.
The council goes to the beach again, this time to help Yokohama scout the place for a school trip. Yokohama chases a boy and gets drunk again so they stay at the inn. At night, they have a test of courage which freaks Suzu out. They also hear mysterious tappings on the wall. Afterwards, they visit Takatoshi's house to study. The council prepares inventions for the school fair. Shino gets lonely and calls everyone individually and converses with them. Suzu has an overnight study party where they take a break to walk Boa. Takatoshi and the Squid episode where he tries to explain to Suzu but they are seen by the other girls. Takatoshi confronts Kotomi about the edited photo where he poses in speedos as a muscleman.
The council helps Hata with filling articles for the school newspaper. They interview the teachers on difficult phrases to say. They suspect the two teachers Daimon and Michishita are a couple, and in the questioning, discover they are engaged. Former student council president Furuya visits Ousai and then invites the council to a festival at her university. They meet the girls from Triple Booking. Uomi and Takatoshi discover they are attending the same wedding and that they will be relatives-in-law. Aria's guess the object segment.
The council clean up their room. When Shino mentions that saving money by going to local farmer's markets is something a good woman should do, Aria hosts the council and Kotomi to her mountain area where they pick wild mushrooms and other edible plants. Takatoshi's inadvertent compliments about Hagimura's Suzu bell get her flustered. They stay over at the family cabin. The council does some exercising and host the lost and found. The council prepares for Halloween festivities and dress up. Rain almost cancels out their costume contest, but it clears out in time.
The council review some of the school rules. The council plans surprise club inspections but is concerned about leaks. They try using a secret code involving tops and bottoms, which is misinterpreted by Hata. Takatoshi helps Shino with her cellphone but is shocked by her message. The council and Kotomi visit Eiryou High School for their cultural festival. As winter comes, the council shovels snow at school and have stew party in the dark at Takatoshi’s house. At night, Shino dresses as Santa and gives everyone presents.
The council members visit a New Year’s sale. They talk about New Year’s resolutions. Squid and Takatoshi segments are back: Takatoshi removes milky slime off of Suzu’s jacket. Jokes about shoes, lunch. Mutsumi recruits for a judo team manager, and does other activities with the team. Dejima teaches the council girls how to make chocolate for Takatoshi. Nene’s history lesson is about a plant stalk that is the shape of a dildo. While shopping for White Day gifts, Takatoshi meets Uomi, and then the other girls gather. To conclude the Squid and Takatoshi segments, Takatoshi checks the girls for alibis. Shino makes lunch for the Tsudas. Afterwards, when Tsuda says goodbye to Shino, he surprisingly meets with Uomi, which makes the girls jealous.
Takatoshi is surprised to find Uomi at his house, ready to make dinner. Shino arrives with food and they have friendly rivalry. They watch a DVD of an old film and stay the night. Aria and Suzu visit the next day and help clean. Hata tries to figure out some slogans for the council members, and rumors arise concerning Takatoshi and Shino. Igarashi slips on the stairs but is saved by Takatoshi. As Aria and Shino go to graduation, Takatoshi and Suzu do some council activities on their own. Takatoshi and Suzu catch up to Aria and Shino and ask why they are leaving without saying goodbye. They then reveal that they have not graduated yet (it was the end of Takatoshi’s first year) and they are actually holding sushi rolls, of which they make dirty jokes.
