Season 1
Episode: 1x01 | Airdate: Apr 3, 2011
Nano blows up. Yuko goes to drastic measures to preserve her lunch, and does a trick with a fire alarm. Kojiro makes a scene about his pet goat.
Episode: 1x02 | Airdate: Apr 10, 2011
Mio is chased by a strange girl. Later she gives her notebook to Yuko only to remember she drew a dirty picture of Kojiro in it, and tries to get it back.
Episode: 1x03 | Airdate: Apr 17, 2011
Nano and the Professor bring home a cat, whom they name Sakamoto and give it speech. Yuko gets into an arm-wrestling match with Mai.
Episode: 1x04 | Airdate: Apr 24, 2011
Guidance counselor Izumi Sakurai tries to enforce rules on the students, in vain.
Episode: 1x05 | Airdate: May 1, 2011
Ms Izumi hires Yuko to draw for the school paper, to Mio's astonishment as she feels she is a better artist. With effort, Mio gets her drawing in the paper... of a half-naked Kojiro!
Episode: 1x06 | Airdate: May 8, 2011
Yuko plays a spelling game with Mio, watches her principal wrestle a deer, and later goes on a camping trip.
Episode: 1x07 | Airdate: May 15, 2011
Yuko daydreams about Mio's hair-bands. Nano, Sakamoto and the Professor play baseball without any idea of the rules.
Episode: 1x08 | Airdate: May 22, 2011
Yuko tells jokes to Mio and Mai, but she is unable to make them laugh. Misato tries to hide her feelings for Kojiro, in vain.
Episode: 1x09 | Airdate: May 29, 2011
Mio is baking cakes, but they are repeatedly ruined by Yoshino's pranks. One prank in particular results in her getting employed as a daifuku mascot.
Episode: 1x10 | Airdate: Jun 5, 2011
Yuko ends up late, and is subject to pranks by Mai; she later thinks about her future. The Professor acts like an adult, to the dismay of Nano and Sakamoto.
Episode: 1x11 | Airdate: Jun 12, 2011
After having a cold for three days, Yuko learns of a test and struggles to prepare for it. The Professor makes super glue that she, Nano and Sakamoto get stuck in.
Episode: 1x12 | Airdate: Jun 19, 2011
Yuko forgets her homework, and later at a theme park enters a stupor when she realizes she has no money.
Episode: 1x13 | Airdate: Jun 26, 2011
The Professor learns of Nano's wish to go to school, and prepares a school uniform for her.
Episode: 1x14 | Airdate: Jul 3, 2011
Nano starts school. Makoto Sakurai joins the soccer club.
Episode: 1x15 | Airdate: Jul 10, 2011
Nano wishes to remove her distinct robotic features, but the Professor instead installs a function that causes her to go haywire.
Episode: 1x16 | Airdate: Jul 17, 2011
Mio's bag, which contains a dirty picture of Koshiro, gets confiscated and she knocks out anyone and everyone in her path to get it back. Yuko pays Nano a visit.
Episode: 1x17 | Airdate: Jul 24, 2011
The Professor makes a crow talk, to Sakamoto's jealousy. Mio and Yuko build a house of cards, an arduous task complicated by Nano and Mai.
Episode: 1x18 | Airdate: Jul 31, 2011
Yuko gets into a hassle at one restaurant with a complicated menu, and another restaurant where a girl laughs at her. She later wants to dress up in a fancy costume.
Episode: 1x19 | Airdate: Aug 7, 2011
Yuko tries to help Mio perform a high jump, and succeeds through an accidental head-butt. The Professor gets the laundry dirty and blames Sakamoto for it, prompting Nano to give her no dinner.
Episode: 1x20 | Airdate: Aug 14, 2011
Mio tries to make a comic with the help of her friends, a task they make worse. The Professor plays hide-and-seek with Nano and Sakamoto.
Episode: 1x21 | Airdate: Aug 21, 2011
Mr. Takasaki tries to get close to Izumi. Yuko dreams about Mio's hairbands again.
Episode: 1x22 | Airdate: Aug 28, 2011
The Professor and Nano force Sakamoto out for a walk, and encounter Mai and her dogs.
Episode: 1x23 | Airdate: Sep 4, 2011
Mio is made to taste fish jam. Izumi and Makoto fight about a dirty magazine in Makoto's room.
Episode: 1x24 | Airdate: Sep 11, 2011
Yuko shocks Mio by telling her she saw Kojiro kissing Nano; both Mio and Misato dream of Kojiro that night. Nano takes care of an ill Sakamoto, so the Professor fakes being sick too.
Episode: 1x25 | Airdate: Sep 18, 2011
Mio discovers Kojiro with Misato and goes on a rampage across town.
Episode: 1x26 | Airdate: Sep 25, 2011
Everyone throws a surprise party for Nano.
Specials
Episode: S01 Special | Airdate: Mar 12, 2011
While the title suggests a story of simple, everyday school life, the contents are more the opposite. The setting is a strange school where you may see the principal wrestle a deer or a robot's arm hide a rollcake. However there are still normal stories, like making a card castle or taking a test you didn't study for.