The cuteness and all those details were what got me to try this game, and those things are absolutely great. I also love that MC is both an adult with a job AND a geek who visits conventions!
I read shibalist's comment (a few comments below) and absolutely agree with their first two points. Idk if it's just me, but I actually don't read the names shown above the speech box in VNs, since it's usually clear who speaks, so it threw me off a lot that I had to start checking after instinctively already reading the speech box itself. Maybe there's a middle ground solution, like putting a greyish filter on MC when she's not talking, or making her portrait smaller, or something like that. Just a thought, it would certainly help me!
Anyway, I'm suuuper interested in Vivian, so I'll definitely check out this game again later and hopefully get to play his route! And I love the art a lot!