With Nagi and Sachi successfully making up, Erika decides she wants to take Nagi shopping after school…only he already has “something important” to do. That consists of having a study session with Hiro at the library, where they spend most of the time exchanging notes.
After that, Nagi is concerned with where else they can study more, but Hiro wants to show him more about herself, so she takes him to a kickboxing studio. Nagi isn’t completely physically incompetent, and thus impresses with his punch. Erika happens to walk by and see how much fun he and Hiro are having.
The last few episodes, Erika has been pretty okay with Nagi doing his own thing, and even said she’d root for him and Hiro, whom she adores. But actually seeing the two together has an effect she didn’t anticipate. She tries to counter that effect by reasserting their technical status as fiancés by announcing they’re going on a date together.
Just as Hiro did at the theme park, Erika takes the lead, buying Nagi some expensive clothes, taking him to a pet store to hang out with some reptiles, and finally going on an exhausting evening run. After each leg of their date, she stares at Nagi and looks disappointed. She eventually tells him: she saw him smiling like a goofball with Hiro, but he never smiles at her!
Nagi takes Erika’s problem to its logical conclusion: she got jealous and pissed seeing him and Hiro together, which means she likes him. Pointing this out doesn’t help matters, but Erika doesn’t outright deny it, simply saying “It’s not that I like you!…Yet!” before storming off.
Nagi, however, remains on the park bench until well after sundown, contemplating how Erika feels and how he in turn feels about that. He can’t deny his heart is racing, which makes him wonder if he likes Erika, and whether what he’s feeling for Hiro is love.
Nagi resorts to googling “love” then going back home for the first time in forever to consult his mega dictionary, but ends up finding a box full of love letters from his dad to his mom. Like, all of them were from his dad.
The letters are dumb, sappy, embarrassing…but his dad kept writing them, and his mom kept accepting them, and eventually accepted and returned his feelings, despite being seemingly out of his league. Sensing his son is questioning his love, he tells him to close his eyes and “ask his heart”—the one he loves should show up in his mind’s eye.
Nagi does this, and for the first time, all three girls appear at the same time, albeit with Erika in the center. Naturally, this is extremely confusing for Nagi, who has operated the entire first half of this series under the impression he loved Hiro and only Hiro. But between Erika and him living together and being pretty goshdarn great together and his realignment of how he sees Sachi, Nagi is finally seeing the full, multi-girl picture.
Of course, this is just the initial awareness stage. It remains to be seen whether he accepts that he has feelings of various levels for Erika, Hiro, and Sachi, or that one day a choice will have to be made that might break two of their hearts (or all three). But it’s a satisfying development nonetheless, and I liked his text response to Erika: he doesn’t like her either…yet. For both of them, “yet” is a shield, but it’s also a kind of invitation.