Nozomu Itoshiki and his students enjoy the festival of Tanabata and talk about instances where people pay more attention to the trivial details of many objects rather than the main subjects. In the middle of their conversation, which Ikkyū-san later joins, the alien race El Niño suddenly invades Japan with their mecha army. Fortunately, Chiri digs up an ancient mask and activates its hidden power to defeat the alien force. The aliens admits their mistake of paying attention to trivial aspects of Nozomu's students rather than the progress of their invasion. At the end, Nozomu and Ikkyū-san do not remember how Japan was saved from the alien invasion, as they were paying attention to trivial details of the battle scene. In the second part of the episode, Jun Kudō is reading books in the school library, while Nozumu is worried about Jun's desire to read everything in the world, which could eventually include Nozomu's own embarrassing mind. When Nozomu's other students visit the school library, Jun tells heart-warming stories that move every one of them to tears. Nozomu feels even more certain of Jun's ability to read people's minds, so he puts himself in a freezing room full of penguins to prevent Jun from reading the conclusion of the episode. The third part of the episode shows what happened between Nozomu's nephew, Majiru Itoshiki, and Kiri Komori while the alien invasion of the 'A Painter by the Roadside' episode was undergoing outside the house.

When Nozomu Itoshiki tries take photograph of his nephew and Kafuka Fūra in the public swimming pool, he is accused of being a spy by another woman. Nozomu blames the society, where everyone, including those who do not have any malicious intent, is suspected of being spy. Suddenly, Kafuka gives him a secret mission and Nozomu has to escapes from the greater suspicion by finding a good place to isolate himself. At the end, Kafuka devises a plan of 'positive counter intelligence' to help him out by leaking unreliable rumors such as urban legends to confuse everyone in the society. In the second part of the episode, Nozomu claims that pretentious side of everyone is ultimately exposed in May. At the end, many of Nozomu's students' hidden secrets are exposed, though some of them are merely his imagination. In the third part of the episode, many things in the world are not divided exactly half and half despite their claim. To correct such mistakes in the world, Chiri Kitsu enforce the ratio of everything into exactly 50/50 ratio, which produces various results at the end.

Nozomu Itoshiki teaches his students to get themselves used to summer vacation gradually as he believes that a sudden change of state is unhealthy for everyone. Suddenly, Nozomu is in despair, because there are too many instances of 'hard landings' in current society. In order to teach how to do a proper 'soft landing', he prepares a flight simulator for the students. In the second part of the episode, Nozomu meets a taxi driver, who is about to do the last driving before his retirement. However, he ends up paying ridiculous amount of taxi fee as he was unwillingly drawn to taxi driver's dramatic situation. Subsequently, Nozomu is constantly drawn to many other dramatic situations despite his desperate attempts of scape. In the third part of the episode, Nozomu discusses various instances of 'backward flow', where people are drawn to various interests in reverse way. While Nozomu considers phenomena of 'backward flow' quite embrassing, Kafuka argues that it is a manly thing to do like a wild salmon climbing the flowing river. Meanwhile, Chiri forces other people to approach their interests in proper way instead of the usual 'backward' way.

Nozomu is paying a visit to Chiri's house after going through various scenes, but his home visit abruptly ends when he reaches Chiri's house. Chiri argues that Nozomu's visit was pointless, but Nozomu points out that most Japanese people take the process more seriously rather than its result. As a typical shōnen manga puts emphasis on the character's development throughout the story, Nozomu asks his students to appeal the audience by showing off development of their immaturity. In the second part of the episode, a warning of earthquake disaster is published by the Ministry of Prediction, which makes every characters except Chiri very lazy as they believe they are not going to make appearance in the magazine. Meanwhile Nozomu points that many Japanese put efforts into various activities despite being aware there won't be any reward for their action. A number of Nozomu's students ends up doing improper conducts as they don't expect themselves to appear in front of the audience. In the third part of the episode, the students are worrying about the dropping interest of book-reading among students. Nozomu thinks that many books should change their titles so that they accurately reflect the content of the book as many books betray the readers' trusts by having inaccurate title. Thus, Nozomu asks Kino and Kudo to give more appropriate names for various books by holding a book-titling competition.

While watching a baseball match, Nozomu wonders about the sad fate of the multi-talented people. If a famous baseball player is as handsome as a model, is he missing a more successful career? Later on, as Kiri is taking some medicine to treat her cold, Nozomu explain to Majiru why did it took a moment for the medicine to take effect : the dreaded time lag, which can be observed in a lot of phenomenon. As the journey to find themselves continues, more of Nozomu's students embarks on the bus and procede to reveal some parts of their personality. In the end, Kafuka leads the group to expose themselves to reality and at the same time the acceptance of their true self as they are, after which she concludes by singing a heartwarming song.

Whilst waiting for the bus, Nozomu and Chiri talks about how important are emergency measures in one's life. Later, at school, the class finds out Nami's birthday, but, because nobody knew about it, everyone makes her a sudden emergency present. Nozoumu, correcting some tests, shows the class how, in the adults' world, there are correct but not right answers. While the class is playing golf, Nozomu's sister tells them that a new course has been created in town. In this new kind of game the balls are represented by people and the tees are disguised as objects or places they have to keep away from as long and as far as they can.

When Chiri hangs up a painting upside down without noticing, the class are taken through a gallery where involving big mistakes that go unnoticed compared to the minor details. In the second part, Nozomu accidentally causes Kiri's blanket to fly away, and the class go on a search for it. However, it flies onto a government member who decides to mass produce it so people will feel more secure. Soon everyone decides to become civil servants and the world becomes impoverished. In the third part, Nozomu and company discuss buzzword generals and are disturbed by one. Maria then mentions "Kiyohiko's Night" (a mispronunciation of Silent Night) and a Kiyohiko shows up, but is unprepared for the abrupt pun.