When Amane catches Eiji showing Nanako a beetle, she knows she’s gotta do something to get these two into a more age-appropriate relationship. Nanako still suggests they check out some fireflies at a pond, but Amane can work with that, and arranges another club field trip, using the nighttime setting to make it a test of courage that brings the two lovebirds closer together.
It works like an absolute charm—which is incidentally what Eiji and Nanako are full of—as Nanako naturally clings to Eiji when she gets scared, and he brings her even closer when he senses she’s in danger.
Unfortunately for Tao, she wasn’t let in on the plan for Koto to impersonate a ghost and grab her in the dark tunnel, but her real fear made it more likely Eiji and Nanako would run off together, which they do. When they get to the pond, there don’t seem to be any fireflies, so Nanako makes one with her phone, fooling Eiji with a giggle.
Then the fireflies do indeed appear, and the two get to share in another lovely experience together. When Eiji suggests they write senryuu to mark the occasion, she almost tells him how glad she is he’s there with her, but decides to be coy instead. Some things are better left unsaid…particularly when Eiji likely wouldn’t understand exactly what she meant!
Nanako’s dad, eager to assess his daughter’s “Yankee” friend (and threatened by expressions she makes when he brings him up), tells her she should invite Eiji to the house during summer vacation. When Eiji sees her text, his phone slips out of his hand and into his ramen.
While waiting for repairs at the store, he ends up having chance encounters with Koto (handing out tissues), Amane (trying/failing to look sophisticated at a cafe), Tao (dressing down for the summer) and Kino (carefully observing a mailbox but drawing a gorilla detective).
He observes that he’s managed to run into everyone today…except the one person he wants to see most. Turns out he saves his best chance encounter for last; the wind blowing her straw hat onto his head. Eiji admits he was thinking about her, missed her, and wanted to see her; Nanako admits she felt the same way about him.
With that, it’s off to Nanako’s house, where her dad is dressed in a traditional kimono and is poised to bare his chest and pounce on Eiji should he put a toe out of line. Ultimately, when he asks Nanako if she’s okay with Eiji’s affirmative answer to the question “are you just friends”, and sees her expression, all the energy drains out of him and Nanako and her brother have to help him to bed to lie down.
That’s when Nanako’s much more accepting mom has a one-on-one chat with Eiji. She explains her husband’s protectiveness as a result of how seclusive and melancholy she used to be, since she was bullied for communicating via senryuu.
That is, until one day, she came home cheerful and beaming, having met someone else who loved senryuu; the first person not in her family “she’d want by her side.” Eiji knows she’s talking about him, and Nanako is listening in the hall, but he doesn’t admit it’s him, and instead rushes off to grab his repaired phone.
It’s Summer, which means Summer Vacation, which means swimsuits. Amane wants to attract a man, and asks Tao to use her crystal ball to help her pick one out for that purpose. For her part, Nanako doesn’t even own one, as she hasn’t been in a pool since she was little.
Amane takes Tao, Nanako and Kino to the store where they are faced with far too large a selection. All the while, Tao’s ball suggests a slingshot bikini for Amane that is “just strings,” while Eiji is ambushed in his room by Koto in a stunning black bikini. If he’s going to have eyes for another girl, she’s clearly making sure he knows what he’s missing.
Nanako, by nature a modest person, starts out with a swimsuit indistinguishable from a dress, then a sarong, but eventually settles on a white bikini that catches the attention of everyone at the pool. It happens to be the same pool where Eiji is taking his little sister, which means he’s present for Nanako’s “grand unveiling” (Amane’s term, not mine!)
She runs back into the changing room, and when Amane tells him what the deal is, he apologizes to Nanako and tells her he’ll keep his distance and avert his gaze. Of course, Nanako wants neither of those things, and so rushes back outside to grab him and assert that it’s okay for him to look, a little—all using a tanzaku she seemingly conjured out of nowhere!
Nanako hates the rain because it makes her hair frizzy, but Amane tells her it’s not that bad—if she walks home with someone while sharing an umbrella, they’ll be “together forever,” and that’s something with which Nanako can get on board.
As a result of the last storm, a tree destroys the school rabbit hutch, so it’s up to Eiji to fix it, but while picking up branches his hand get riddled with splinters, necessitating a trip to the nurse…who is just Koto in nurse cosplay. Even not in the running, she’s going to have her occasional fun with him.
When Kino joins the reconstruction effort, she envisions a grand, avant-garde, Gaudi-like creation that’s simply too much for a rabbit hutch. Yet, when the hutch is rebuilt, the door falls off the hinges and all the rabbits escape, making Tao’s prophecy come true.
Thankfully, Amane sends a message through the PA for anyone who finds a rabbit to capture it and return it to the hutch, and all the rabbits are retrieved. All that’s left is for Eiji and Nanako to walk home, but since both of them forgot umbrellas, Amane provides a key assist by giving them one of hers. All’s well that ends well!
This week swaps one new girl out for another: the fortune-telling, purple stripe-loving Hanakai Tao, whom Nanako and Eiji learn about through Amane. When they go to have their compatibility assessed, she determines from their names that they’re the most incompatible couple imaginable. Only problem is, she used the wrong kanji for Eiji’s name. Still, Nanako is happy because Eiji is so quick to dismiss the unfavorable verdict. Turns out Tao also attends their school.
Her Tarot reading points towards a night of good luck for Nanako…and Eiji getting struck by lightning. Of course, one shouldn’t take the cards too literally. Nanako probably would have had a good time regardless of luck—just spending time with Eiji makes her happy—while the “lightning” that strikes Eiji is the shock of discovering the size of her bust after she removes an outer layer after their rollerskating. Nanako and Eiji enjoying each other’s company simply never gets old…especially in this half-episode format.