Hyakko Episode Rating Graph

While Ayumu is looking for a way to her classroom, she encounters Tatsuki on her way. Shortly after, they see Torako and Suzume leaping down from a second floor out of a window. After joining together as a group, they heads toward the classroom. About midway through the walk, they find an abandoned school building and accidentally break one of its window. A school teacher, Mr. Amagasa, discovers their act, but Torako gives him a quick punch to stun him. Although they eventually reach the classroom, it later turns out that Mr. Amagasa was their homeroom teacher.

Ayumu, Tatsuki, Torako and Suzume are looking for a school club to join. They try out several sports clubs together, but Torako ruins every attempt as she pulls various pranks on Tatsuki.

While Torako and Suzume are having a conversation together in the morning, they encounter Nene on their way. Torako is informed by her that she was involuntarily decided to be a member of the class discipline committee. On the next day morning, she is assigned a duty of checking the student's dress code. Later Torako and her friends discover that Nene is actually quite keen on the female students. In the second part of the episode, Torako and Suzume discovers a grotesque robot made by Chie, who is a member of the robotics club. Later, Torako and her friends are invited to the robotics club room and they learn about Chie's dream of becoming a robotics engineer.

Torako and her friends go to the school cafeteria together. On the way, Torako teaches Ayumu about the 'Combo Card' which gives an extra portion of a meal. Torako pulls a prank on her by making her accidentally to order a noodle with extra large portion. Tatsuki is offended by Torako's mischievous behavior, while Suzume's extraordinary gluttony is revealed. In the second part of the episode, Torako and her friends are in an art class, where students learn to draw each other. Ayumu and Torako takes seductive poses on the floor, while Koma passionately snaps their photographs with her digital camera. Later, Koma sells some of her photographs to a student for profit.

A new character, Yanagi, is introduced. Just like Koma, he makes profits from selling photographs of the students. When Shishimaru looks at Yanagi's photograph of Ayumu by chance, he is instantly infatuated with the photograph. On his way, he encounters Ayumu and confesses his love to her. However, it is later revealed that Shishimaru has actually asked Ayumu to tell Torako about his love for her. In the second part of the episode, Torako and Ushio skip the class together and spends their time together in the downtown and develops a friendship with each other.

Torako, Suzume, and Ayumu visits Tatsuki's home without informing her in advance. Although Tatsuki is caught off-guard and is quite surprised their visit, she gladly invites them to her home. Meanwhile, Tatsuki's housemaid is relieved that Tatuski has made some good friends in the school as she had trouble making friends in the past. Tatsuki's friends are invited to the dinner and they are impressed by her housemaids' kindness.

Koma and Yanagi are hiding in bushes and taking photographs of students secretly. Meanwhile, Kitsuna decides to help them out and pulls a skirt prank on Ayumi, so that Koma and Yanagi can take 'better' photographs of her. Then the three students encounter Shishimaru, who wants to have photographs of Torako, but he thinks taking photographs without the consent of the subject is a despicable act. The three comes out of bushes and politely asks Torako for photograph. Suddenly, Torako is surprised to see Kitsune, who turns out to be her brother. In the second part of the episode, Torako complains to her friends about all the bad memories she had with her brother in the past. On the next day, Kitsune brings Shishimaru to Torako's lunch. Kitsune decides to pull another prank on Torako by secretly putting a whole bottle of spice in Torako's ramen, which forces Torako to switch her meal with Shishimaru, bringing unintended affect on their relationship.

Inori is in distress for not being able to make friends as she has trouble speaking out loud and her face covered by a long hair freaks out other students. Torako then decides to help her out by asking her friends to renovate her face, so it can give a better impression on the other students. Meanwhile, Torako goes around the classes and changes the classmates' and her homeroom teacher's hairstyles as she pleases. After the make-up is done, the classmates are amazed at Inori's new face. However, on the next day, Inori's appearance reverts back to her ordinary form, which disappoints her friends; she later explains that she is not good enough to do the make-up every morning.

Minato drops and loses her only coin in front of the vending machines. When She loses her hope of retrieving the coin and begins to cry, Torako and Ayumi happens to meet her. Torako buys her a can of drink, so that she would stop crying. After receiving a favor from Torako, Minato persistently tries to return the favor by constantly offering any helps, which eventually annoys her to the great extent. Torako devises various plans of keeping a reasonable distance from Minato, but all of her plans fail at the end. In the second part of the episode, Suzume walks around the school and receives foods and drinks from her friend as a goodwill. Later, Torako and Ayumi is amazed at the amount of gifts that Suzume collected around the school.

When Tōma is passing away her time on the top of the school building, Torako approaches her and tries to have a talk. Tōma, however, rejects and makes a statement that she dislikes Torako, while Torako thinks Tōma is too boring. Later, Tōma encounters Torako's friends in school and she decides with certainty that all of them are strange in one way or another. In another day on the top of the school building, she looks back upon the past when she met Torako in Kamizono High School as a visiting middle school student and made their friendship. In the afternoon, Torako invites Tōma for a lunch along with Ayumi, Suzume, and Tatsuki and Tōma is surprised at how easily she blended into the group.

When a colleague has to rush home to care for a sick child, their home-room teacher declares a self-study hour, which moves to the gym to get an early start on the next period's PE class. Meanwhile, Yanagi and friends kibbutz from the balcony, with Yanagi hoping to get easily-marketed photos of the girls in their gym clothes. The time in the gym turns into a deadly game of dodge-ball, with most of the class laid out by brutal throws to the face. To bring peace, Torako suggests trial by champion --- Suzume vs. the teacher.

All of the girls learn about Torako's past with her two step-siblings once Torako argues with her sister out in the hallway. Torako finally gets Touma to talk to her.

Set prior to the events of the series, everyone gets ready for the first day of high school. Meanwhile, Torako and Suzume decide to run away from home.