After Nagi’s realization sparked by dad that he harbors feelings for all three of Hiro, Erika, and Sachi, he realizes something else: he cannot think about anything else. This realization, combined with the reality that he hasn’t been studying nearly as much as he used to, comes crashing down on him in the middle of midterm exams. He ends up bombing, falling from first to thirteenth.
Nagi shambles home and holes up in his dark room, feeling like trash, since he believes his primary value to be studying and acing tests. Under the pretext of complaining about dinner not being ready (complete with growling stomach), Erika enters his room to tell him that’s simply not the case, and no matter his rank, he’s “just as valuable” to her.
It’s an extremely cute and bold move from Erika coming off her “not yet” amendment, and Nagi can’t help but smile when he realizes she’s both trying and succeeding to cheer him up.
Hiro is a slightly different story. Back at school, she starts blatantly avoiding him, but then leaves one of her signature not-love letters in his shoe locker. Erika suggests that Hiro feels betrayed because Nagi was on his high horse about beating her once only to fall so far on the next exam. But as we learn when Nagi meets Hiro at the beautifully lit basketball court after school, that’s only half of Hiro’s story.
After Nagi apologizes for letting his guard down and commits to doing better, Hiro passes him the rock, giving a playful rhythm to their make-up talk. But it wasn’t just her respect for him as an academic rival that made her upset; it was learning how quickly he cheered up without any input from her. She wanted to be the one to cheer him up first but Erika beat her to the punch.
Watching Hiro make a layup in dazzling slow motion, it occurs to Nagi that while things are a lot more complicated with regard to his romantic life, he still loves Hiro aplenty, and still wants to beat her enough times at exams so he can “change her fate” she’ll process his confession. But as we saw during times when he and Erika were having what amounted to lovers quarrels in earshot of both Hiro and Sachi, everyone coming out of this happy and satisfied is a tall ask.
I’m not surprised Nagi wants to try his best to simplify and work on things he knows he can by getting back to his intense studying regimen and climbing back to the top of the rankings. Even then, Erika makes it known she needs his help studying, or her folks will bring her back home.