Not entirely wrong was still wrong enough, and Keigo hates their fairy tale life a little more.

"I'm not eager. I'm only doing this because I have to! That other part wasn't fair, though. I might sound like that. I'll be excited when we pass this test."

If they pass this test. But Keigo leaves that unsaid and wishes for some of Tonbokiri's optimism as he follows him back into the woods. Now that he knows just how tricky this is, he's going to listen carefully and think extra hard before he makes a single move in the fog.