It works!
Here's Prince of Persia, a game on a single disk:
And a two disk game, 4D Driving, also works fine:
The only minor issue is that the floppy drive order is reversed for some reason Drive B is on the top and A is on the bottom. And yeah, this monitor I'm trying it with is cropping off the image and I can't seem to do anything about it. But overall, other than I haven't tested the CD drive yet with something like Policenauts, I'm very proud to be a working PC-98 owner in the United States. Once I get the keyboard and mouse and really get to use it, I'll be sure to make a video on it.