Shinichi is actually impressed with her house-or castle. Whatever it is. It might show on his face with the way his eyes widen slightly or the fact it takes him several seconds to even respond as he just takes everything in.

"It's pretty good, I guess..." He finally says, looking off to the side. "But does it have a library?" Because that's honestly the most important question. If he has to stay here then he needs to have a steady stream of mysteries coming in to read.