Junichi finds himself getting his back washed by his girlfriend Tsukasa in the bathroom until he realizes it's a dream after Miya wakes him up. It's been a month since the Founder's Festival and Junichi and Tsukasa became a couple. Tsukasa decides to run for Student Council President and chooses Junichi as her vice-president as she faces three other candidates including Sae who is running by Miya's insistence that it help overcome her shyness. However, one candidate that Junichi and Tsukasa are keeping an eye on is Noriko Kurosawa. Noriko is just prideful and manipulative like Tsukasa and to spite her, Noriko also chooses Junichi as her vice-president as well. Tsukasa at first doesn't take the threat of Noriko seriously but when the first pre-election survey reveals Noriko is in first place while she is behind in third, Tsukasa realizes Noriko is using her father's influence who is a member in the city council.

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Tsukasa sees Noriko about to kiss a panicked Junichi and angrily drags him to the Janitor's shed which Noriko believes her plans have work. Instead, Tsukasa kisses Junichi to calm him down, revealing she was aware it was a trick by Noriko to cause a rift between them and makes Junichi promise not to fall for Noriko's tricks or kiss any other girl than her. On the day the candidates give their speeches, Junichi and Tsukasa's supporters give Tsukasa a sash with their signatures and supporting words for her. As she goes on for her speech, Junichi comforts a nervous Tsukasa who goes on to give an inspiring speech to the students. Tsukasa wins the election by landslide while Miya and Ai celebrates Sae getting second place and overcoming her shyness at a Karaoke bar. Noriko, distraught by her loss, vows to her friends she will beat Tsukasa and steal Junichi from her in the next election. On the way home, Tsukasa and Junichi encounter a stray dog chasing them.

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Months have past since Rihoko and Junichi have taken over the Tea Club. While it's already summer classes, Kanae is still annoyed that Rihoko has yet to confess to Junichi. While both of them are cleaning the Tea Club, Junichi reveals to Rihoko that he is suffering from heat fatigue due to eating only watermelons and noodles ever since his parents went out to help his injured uncle. After reminiscing their past of measuring each other bodies, Rihoko decides to cook dinner for Junichi and Miya to help with his heat fatigue much to his joy. As she goes out shopping, she reunites with Manaka and Ruriko who are selling cooked eels as part of their university project. After telling them what she is doing, Manaka and Ruriko give Rihoko some cooked eel to help Junichi's heat fatigue. As she heads to Junichi's home with her groceries, she encounters her classmate Makabe who asks her to follow him.

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Makabe decides to leave Rihoko alone after hearing who she is in love and with goes after another girl only to embarrassingly realize it's Hibiki and Haruka. Junichi returns home after Rihoko arrived to cook dinner but feels awkward around her after he secretly learns she is in love with him. During dinner, both Junichi and Rihoko attempts to say what is on their mind but always gets interrupted by Miya. With the weather tonight raining, Junichi and Miya allows Rihoko to stay at their house for the night. As Rihoko takes a bath, Junichi looks an album containing both he and Rihoko when they were kids till the present and realize his feelings for her. Later that night, Junichi helps a sleepwalking Miya to the bathroom and meets Rihoko at the guest room. As they reminisces their past playing fireworks when they were children, both of them finally confess their feelings to each other. Junichi tells Rihoko he was always in love with her and never realize it until now.

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Almost a year after they started dating, Junichi and Ai are reflecting over their time together at the beach. With Junichi studying at a cram school and Ai tending to her responsibilities as captain of the swim team and at home, they are spending less time together, though they are looking forward to their date on Christmas Eve. One morning, after Junichi studies too late, Ai goes to wake up Junichi and walks with him to school as they pass by Ai's teammates. After spending some time at the library studying, Junichi decides to visit Ai, only for the swim team, which includes Miya who recently joined, to reprimand him of his actions. Soon after, Junichi finds himself sleeping at the infirmary after another late night study session. Ai decides to visit him as Junichi asks her to let him sleep on her belly while singing him a lullaby.

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At the Founder's Festival, Miya and Sae's class is doing a play of Romeo and Juliet with Miya and Sae as the lead characters respectively while Ai is working at the Girl's Swim Team Oden Stand. When she gets her break time, she reflects on last year's Founder's Festival with Junichi and starts to tear up wondering how Junichi's doing. After the Founder's Festival ended, Miya and Sae invite Ai to a slumber party at Sae's place, but before they could go, Ai forgets to get her brother, Ikuo, a present for Christmas. She finds an Inago Mask belt toy at the store, bringing up memories of her time with Junichi again as she stars tearing up again, feeling lonely that she can't spend this time with her boyfriend. But then she hears a familiar voice and turns to see Junichi behind her who snuck out of camp to spend his Christmas with Ai. They call Miya and Sae to tell them that Ai's not coming and leaves Ikuo's gift at his bedside as they go on their long awaited date.

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Kaoru is doing an MC of an Inago Mask show at the amusement park getting into her role as Junichi is playing one of the evil minions. After Kaoru starts deviating from the script which sends Junichi through the stage, he retaliates by attacking Kaoru with other bad guy costumes. Flashback to before the summer break, Kaoru is helping Junichi with a art assignment and helps him, rather suggestively by sitting on the chair he's in with everyone watching. Kaoru and Keiko talk about Kaoru and Junichi's relationship and how they looked too much like a couple during moments like that. Kaoru also begins to realize that even though they've been dating for almost half a year, their relationship hasn't drastically changed from before they were dating. After Keiko suggests that the two should go on a trip together, Kaoru and Junichi plan out a trip by getting a part-time job doing the Inago Mask show.

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Junichi and Kaoru are picked up by a passing truck who's driver sends them to a nearby hot spring inn with a bus stop. As they both start to argue over who's fault for missing the bus, the truck driver comments and gives some advice for the couple. Arriving at the inn, both of them realize the inn looks haunted and with only both of them the only customers, Kaoru is scared of being alone that she asks Junichi to accompany her even at the baths. After having a meal and heading to bed, Kaoru confess to Junichi that she set up this trip as she wants to know where their relationship is heading but Junichi has fallen asleep. The next morning, Junichi learns he left his coin purse at the bus stop, leaving Kaoru to use almost all her money to pay for the inn bill. Both of them argue again with Kaoru blaming Junichi for being careless and him blaming her for on always buying limited-edition snacks, which both of them refuse to talk with each other to the bus stop.

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It's been about ten months since Sae and Junichi have been dating and Sae's self-confidence has broken her out of her previously shy personality thanks to Junichi. Because of this, she is able to hold conversations with others, be more efficient with her job, and be around dogs owning one herself, though big dogs still scare her. This has also started to make her popular amongst the students as Junichi begins to feel threatened as his classmates are in disbelief that he is Sae's boyfriend. In response, Junichi goes all out to provide lunch for Sae only to hold up a line, get her favorite sauce picked out by the lunch lady, and to top it off, Sae herself comes to take their food to their table, thus he starts making more of a mental tab of what she likes. After going to the shrine where Sae made a wish, Miya tells Junichi that Sae is going to a hotel for a wedding meeting.

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As Tsukasa helps prepare Sae with her duties for the Founders Festival, Junichi is feeling saddened by the lack of time he is spending with Sae as well as how he doesn't know how to help Sae. While reflecting at home, Junichi reflects with several tapes of Sae in his various movies when he gets an idea to film a documentary of Sae as the head of the Founders Festival this year. While filming, Sae begins to feel more pressure as the days go on but continues on. One day, Miya finds out that Sae is in the infirmary which Junichi rushes over to check. An awaken Sae explains to a worried Miya and Junichi that she was tired from working late at night and went to the infirmary to rest. Ten days before the Festival, Sae and her staff learns the Drama Club overspent their budget and don't have enough funds to buy costumes and recently learn the Swim Club and the Tea Club needs new equipment.

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A few months have past since Haruka and Junichi have become a couple. During their date, Haruka asks Junichi when is he going to meet her parents which catches him by surprise. Haruka later reveals to Hibiki that she wants Junichi to propose to her during graduation day just like her British grandparents and her cousin, Jessica Morishima and her fiance did but doesn't want to force him. While Hibiki agrees to keep it a secret, she helps Haruka make Junichi ready subtly by helping the couple roleplay pretending they are getting married, having a baby and a family dinner with Hibiki playing the role as their daughter. But when Junichi won't answer Hibiki's question on how he propose to Haruka, Haruka is upset during their walk home but much to their surprise, they are greeted by Jessica who has come for Haruka's Graduation ceremony. Jessica is aware about Haruka's plans and tells her to tell Junichi soon before graduation.

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Junichi is rather nervous of Haruka coming over as not only is she cooking for him but also staying over for the night as well which coincidentally his parents and Miya are out. As they go to bed, Haruka reveals she is leaving for England to be with her grandparents after her graduation ceremony which comes to a shock to Junichi. After confirming the story from Hibiki at school, he calls Haruka at her home only for Jessica to pick it up. Realizing what he's worried about, Jessica misleads Junichi saying not only Haruka will be leaving Japan and staying at England permanently but studying there as well and for Haruka's sake, he shouldn't speak to her. As Junichi walks around in town wondering what to do, he has an epiphany after seeing a wedding dress on display. On the day of the graduation ceremony, Miss Takahashi is surprise to learn that Junichi will be giving out the congratulation speech as the student representative instead of Tsukasa because he begged her.

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In the episode, Junichi hasn't gone around with any girls yet. Miya goes to a hot spring with Sae and Ai. There she meets Tsukasa, Rihoko, Kaoru and Haruka. The main characters except Junichi enjoy girls' talk in the hot spring.

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