Nishikata attempts and fails to prank his seatmate Takagi using an improvised jack-in-a-box. Later, Takagi borrows his eraser, reminding him of a childish tale that used to be popular, stating how if one writes their crush's name on their eraser and finish using it, their love will be mutual. While she is away, Nishikata takes her eraser to write a name on it. However, he sees a message that says, "Look at the hallway" where Takagi is there giggling. Secretly though, Nishikata's name is written on the other side.

Nishikata goes to school and sees Takagi on the window. When he cannot find her, Takagi pops out from the curtain besides him. Yet again, Nishikata fumbles in humiliation.

As Nishikata tries to make a funny face to Takagi, she gives him tips for a much improved and even funnier face. However, as he turns his head, he faces Mr. Tanabe and gets scolded.

Nishikata and Takagi's class is having calligraphy lessons when Takagi proposes writing a word of what they want from each other. Nishikata's second attempt backfires when Takagi uncharacteristically shows kindness to him. As it turns out, she had rubbed ink on his face, as her second calligraphy depicts.

Mina and Yukari mope about the heat when they notice Sanae wearing a short-sleeved uniform. Later, Mina and Yukari switch to shorter sleeves, but Sanae is in a longer uniform.

During English class, Nishikata plans to distract Takagi long enough so she cannot answer the teacher when it is her turn to read aloud. To his disappointment, although she is caught by surprise, she easily finds the assigned line and answers it.

Mina tries to drink a can of coffee, but struggles with its strong taste. Sanae offers her juice, which Mina graciously accepts before Sanae clarifies such a drink is childish.

On the way to school, Takagi suggests a contest to see who can throw their respective cans in, with the loser forced to obey the victor. After she successfully makes her toss, she distracts Nishikata enough on his attempt to miss.

Mina drinks a bottle of soda, though its fizz is too discomforting for her. Yukari drinks it without problem until she feels the urge to burp. She then lets one out while Mina talks loudly, which Sanae notices.

Nishikata decides to form an exercise regimen based on Takagi's teasing. After she comments that he looks more muscular, a motivated Nishikata strives to continue his training.

Mina, Sanae, and Yukari see two cats outside and pretend that they are having a conversation as a couple.

Nishikata is ordered to clean the science room. Before doing so, he discovers Takagi hiding in a closet, after which she convinces him to play four rounds of rock-paper-scissors, with the loser cleaning a quarter of the room. Nishikata ultimately loses all four.

When Nishikata notices a jungle gym, he assumes Takagi will be reluctant to kickover the high bar. However, she orders him to look away during her first attempt. When Takagi goes again, Nishikata, who believes she is cheating, looks and realizes she is wearing shorts underneath her skirt, but concedes defeat as he broke the no-look rule.

After spending the night watching the anime 100% Unrequited Love with the air conditioner on, a sick Nishikata arrives to class late. Concerned for his health, Takagi does not tease him throughout the day. After his attempts to instigate her fail, he tells her he is not actually ill and had simply overslept.

Nishikata is busy studying for exams when Takagi joins him and decides to help. As they head home in the evening, Takagi reveals the study problems they were doing will not be on the test.

Yukari stresses the need to get at least ninety percent on her exams to earn any video game she wants. As she begins to study the category, she discovers the next test subject is math, to her disbelief.

After getting their test results back, Nishikata and Takagi try guessing each other's scores. When Nishikata overthinks his answer, Takagi reveals his initial guess was actually correct.

At the bookstore, Nishikata buys the latest volume of 100% Unrequited Love. As he is leaving, he runs into Takagi. Not wanting her to know this, Nishikata lies until Takagi reveals she saw him buy it.

After seeing their classmates Mano and Nakai riding a bike together, Takagi suggests doing the same with Nishikata, which he reluctantly agrees. When they begin practicing, Takagi agitates Nishikata. Upon failing, he gets her a can of juice but does not have enough money for himself, prompting Takagi to buy one for him.

At Yukari's house, she is working on her summer homework while Mina and Sanae chide her for not enjoying the break.

Unable to practice tandem, Takagi challenges Nishikata to a test of courage. Inside a tunnel, Takagi begins to play pranks on Nishikata. At home, Nishikata continues his workouts.

While walking and eating popsicles, Mina and Sanae tell an annoyed Yukari that she will help them with their assignments due to her being the class president.

At the mall's bookstore, Nishikata purchases the latest volume of 100% Unrequited Love, but encounters Takagi outside, and she makes a bet saying she knows what he bought. To deceive her, Nishikata copies the characters' actions. Despite this, however, she still guesses correctly.

Having lost the bet, Nishikata has to help Takagi select a swimsuit, a task that proves too embarrassing for him. When he sees Mano and Nakai in the store, he hides in the dressing room until they leave upon greeting Takagi.

At the beach, Mina and Sanae prepare to swim when they notice Yukari pumping air into a life preserver as she cannot swim. Deciding to leave her, the two enjoy their day until they return to find an exhausted Yukari, who had to exhale into the inflatable as the pump broke.

Embracing the typhoon's severe winds, Nishikata role-plays as a wind-controlling character when Takagi overhears him. She copies his behavior, which he vehemently denies ever happened. Noticing she does not have her bike with her, Nishikata is quizzed on why, but cannot provide an answer in time.

The school participates in a marathon, with Nishikata and Takagi creating a competition over who would be faster. They eventually agree to see if he can keep within a certain distance of her, a deal that ultimately leads to Nishikata's defeat as the girls are only required to run half the distance.

On the walk home, Takagi pokes Nishikata's ribs, tickling him. Peeved, he considers responding in kind when she proclaims her ribs cannot be tickled. Nishikata plots various distraction strategies, all of which do not come to fruition, before Takagi allows him to poke her to prove her point.

Nishikata gets a new cell phone and exchanges emails with his friends. Interested, Takagi asks to see it, which Nishikata prepares to exploit until she hands it back. Meanwhile, Mina and Yukari consider getting cell phones of their own and ask Sanae if she wants one, but she declines until she reveals she already has one.

During cleanup duty, Nishikata and Takagi talk about their cell phone activities when the former decides to send her a scary video. Takagi eventually watches it, but is unfazed as horror does not have the same impact in the morning. At home, Nishikata considers his next move until Takagi calls him, and the two converse for the evening.

As they walk to school together, Takagi notices Nishikata has grown, leading to a height comparing contest. When Nishikata becomes skeptical of Takagi's measurement, she faces him directly before she admits she had been standing on her toes while their backs were turned.

With winter arriving, Mina and Sanae decide to place their cold hands on Yukari's skin to elicit a reaction. When Yukari tries to do the same, she gets no response as her hands are too warm. Takagi does the same to Nishikata, which the trio notices as Yukari starts to assume they are indeed dating.

Besides Yukari, Nishikata's friends infer he is dating Takagi when he declines their invitation to play video games. After asking Takagi directly, Mina discloses they are not going out, while Nishikata also denies it. As Takagi is usually the one who asks Nishikata to walk her home, she asks for his thoughts on the matter, but he is too nervous to give an answer.

Nishikata tries to pet a cat until Takagi's calls distract him. While she is petting another one, she tricks him into admitting his desire to do the same thing. However, the cat runs off.

While seemingly having a conversation about boys, Yukari eventually realizes Mina and Sanae are actually talking about their favorite dog characteristics.

In art class, Takagi and Nishikata are tasked with painting portraits of each other. Nishikata tries to draw a demonized image of Takagi, but he feels guilty about it. She then shows him hers, which he incredulously questions.

Takagi has her fortune told via tarot when Nishikata walks by for room cleanup. She then challenges him to rock-paper-scissors, which he unexpectedly wins. Takagi later tells him the fortunes regarding their crushes and the game.

The class has been secretly writing love letters to one another. After a while, Takagi affirms to Nishikata she wrote him a letter. When he reads it, it is just an invitation to walk home with her.

In a flashback to their inaugural day of middle school, Takagi was worried after losing an unknown item when Nishikata arrived to class late. After getting their seat assignments, an annoyed Nishikata complained to his seatmate about how a "Takagi" was responsible for him being late. After the entrance ceremony, she revealed she was the one he had helped, while the lost object was her handkerchief.