When Iroha sees Hikari with Ayado after telling her to stay away from him, Iroha is jealous. While she almost immediately regrets asking Ishino for advice, Ishino makes some good points.
Just because Iroha may not have ever told someone “the way she wants it to be” doesn’t mean she “has no right” to do so. In this case, it’s not imposing her will on Hikari so much as expressing how she feels to him, considering he’s not the world’s most perceptive man.
The situation resolves itself in a satisfying way, when Iroha witnesses Ayado being accidentally soaked then openly mocked by classmates, but turning the other cheek. She sees a lot of Hikari in her, someone who is kind and gentle, but also someone who perhaps gives too much without asking for anything in return. Hey, Ayado has a lot of Iroha in her too!
Iroha’s jealousy dissipates as she learns Ayado is a good person, while feeling regret for insisting Hikari trust her while initially doubting him a bit in this case. Iroha also seems worried about coming off as overly hostile or angry all the time, but Hikari doesn’t mind; he wants her to feel she can talk to him about anything bothering her.
The next day Ishino acts as Iroha’s attack dog unbidden, but they’re interrupted by Ayado herself, who wins Ishino over as quickly as Iroha (noting how Hikari surrounds himself with such beauties). With both Iroha and Ishino thus approving of her, Ayado seems poised to join their circle of friends.
Itou, on the other hand, bolts upon being introduced, but that turns out simply to be his shyness, and once he learns what a nice person Ayado is, before long he’s offering her a handkerchief to wipe away the tears of joy she sheds upon being invited to a picnic with the others.
Later, Hikari touches Ayado’s hair while trying to pluck something out of it (it turns out to be a caterpillar, which he’s not into). But unbeknownst to Hikari, his careless gesture of intimacy has Ayado’s heart racing.
When the weekend arrives, Hikari spends some quality guy time with Itou in Akiba, after Iroha politely declines to join them, insisting “she’ll be fine.” Hikari’s been given significant funds to spend on making himself look less scruffy-looking, and who should appear but the stylish Takanashi, who is apparently only in Akiba for a “computer part” (the district’s original claim to fame).
Takanashi reluctantly tags along and offers Hikari tips, all the while wondering “why am I doing this?” It’s not that complicated: Takanashi is not a complete asshole; as such, he feels bad about what he did to Hikari at school, and this is an act of penance.
He is rewarded when he’s able to witness Hikari being a badass when Ayado—handing out tissues in a maid costume for a new cafe to earn money to buy a figure she wants—is harassed by young men who find her irresistible.
Hikari isn’t overly judgy or aggressive—he merely puts himself between Ayado and the lads and firmly informs them of proper Akiba etiquette regarding maids, and encouraging them to come back once they’ve done more research. This performance causes Ayado to swoon once more.
Hikari meets up with Iroha that evening to apologize for not hanging out with her, and Iroha reiterates that it’s fine, and they have a nice chat (and he shows her his new fashionably short pants). The next morning Ayado races past them, and while it’s plain she has a crush on Hikari, it’s not plain to him.
When Ishino suggests, no, assigns the group of friends to a camping trip at her relative’s cabin in the woods, Hikari is firmly against such a “normie” activity—until both Itou and Iroha express genuine interest. Ishino is entrusting Hikari with inviting her crush Takanashi, while Itou is considering inviting his new crush Ayado.
So Ishino likes Takanashi, who like(d) Iroha; Iroha and Hikari like each other, Ayado likes Hikari, and Itou likes Ayado. Should be an interesting camping trip!