Very precious!
Ai's going to have to talk to Misumi about boundaries and when it is, and is not, appropriate to get affectionate. At least, if Misumi doesn't want to end up showing her latest work to Ai by holding it up to the glass prison divider.
It's interesting to see the end of the show they're fans of coming up! Definitely a important step if their relationship is going to last; can't be 100% built on that. Here's hoping Misumi makes the jump to original works, or at least branches out to other fandoms and pairings.
Rival has been demoted to comic relief, which is good! Things have been pretty light so far, and I'm a little concerned we'll get her contemplating turning Ai in. But that might be too serious for this story.