Its cute how they were already both so obviously into each other that, once they finally crossed the hurdle of expressing those feelings, their transition to being a couple was so subtle it almost seemed like their relationship hadn't actually changed. Like, the only difference in how they act around each other now is the occasional makeouts. Its sweet.
Aya's grades dropping could mean next we're getting a group study session, or Aya's gonna have to give up some of her Mitsuki time to go to cram school, and they'll both be sad about it. yeah no Aya struggling to learn english for Mitsuki makes way more sense, i'm dumb.
I am happy tho that we aren't getting too lost in mindless fluff and there will still be an actual story going forward, even after they've hooked up.
Edit: just saw someone in the replies on twitter point out that on the last page, several of Aya's nails are cut shorter. Which is a very funny detail if it's intentional.