Y'know, I was starting to feel like this little candy-floss series was wearing out its welcome. "What's actually changed?" I thought. I don't much care for the "perpetual present" so common in sitcoms or cartoons where everything resets to the status quo at the end of the episode no matter what happens, so I was getting weary here.
And then I actually thought about what HAD changed. And I realized that the growth & development may be slow, but it is there, and it's mirroring the nature of a real life adolescent relationship.
Over the course of 4 volumes it's gone from Shiraishi resenting Kubo's intrusions into his quiet solitude, with neither he nor the audience knowing whether it's flirtation or mockery, to Shiraishi welcoming her presence in his life and accepting that she means well. We've seen their occasional interactions in school graduate to occasional "outings" (neither one can admit they're dates yet). We have learned that Kubo isn't just teasing him to amuse herself, but is attempting to form a genuine connection because she has genuine feelings for him. We have learned (alongside Shiraishi) that Shiraishi really does have feelings for her too but is afraid to accept that anyone can really "see" him. We've learned that, far from being a manic pixie dream-girl who just exists to pull him out of his shell, Kubo actually has a rich inner life, deep friendships outside of Shiraishi, a supportive home-life, etc. We've learned that Kubo is actually deeply insecure about her appearance, her identity, her place in the world...but pretends to be confident and assertive because she thinks she has to be (e.g.: insisting on drinking black coffee even though she finds it disgusting because she wants to be more "grown up"). We've seen more and more people start to notice and remember Shiraishi due to Kubo's influence on his life, and we've seen Shiraishi alternately recoil from and welcome that unexpected scrutiny.
Most notably, in this volume we actually learn WHY Kubo takes an interest in Shiraishi! And far from being the typical manga/anime tropes of lifelong childhood adoration or love at first sight or the magical power of fate or whatever, it turns out her interest just developed normally and naturally over a long period of time. She started out merely intrigued by the fact that most people didn't notice him, making him into a sort of "private secret" for her; she entertained herself by trying to pick him out of a crowd at school, amused herself by startling him & teasing him (since he was so used to being ignored), then slowly got to know him and appreciate who he was. It turns out that, effectively, the series we've been reading up to this point has been Shiraishi catching up to where Kubo had finally gotten at the start of the series. And now that they're at the same stage, the dynamic between them is beginning to change.
Which again, pretty accurately mirrors adolescent life -- girls tend to gain emotional maturity more quickly than boys, and boys tend to be resistant to change when they're comfortable. It reminds me of the old adage that women love the man they want their man to be ("I can change him!"), while men want their woman to stay exactly the way she was when they fell for her ("Never change, babe!"). Kubo's disruptive influence comes from the fact that she wants things to change between them, wants him to catch up to her, while Shiraishi fears any change to his comfortable status quo...and fears that such change might actually ruin the relationship they already have. It all feels very adolescent and very human.
And just like the covers, just like Shiraishi in the narrative, unless you follow Kubo's example and make a point of looking at what you might otherwise ignore, you aren't going to notice the surprising amount of depth and "reality" in what seems like a bit of silly fluff.