[There's no way Minato would go to Haruhi's house in a moment like this, so Keiichi doesn't even consider checking there even if Koromaru stops there. Sure enough, the dog eventually keeps following the trail... Minato should have taken the dog with him if he didn't want to be found, honestly.

Keiichi just gives a look at the community building they stop at.]

What's up with us and invading empty apartments?

[Unless Minato is actually staying with someone else, which it could be. Though Keiichi is selfish and likes to bet for the option of him being alone.]

I'll tell you something, Koromaru. Next time I try to run away from Minato and the world? I'll go to the hot springs. Bet no one will check there.

[Anyway, entering there now. If Minato's there the trail should be even easier to follow.]