Jōno is your older brother, as he works at the Hunting Dogs, so he doesn't get to hang out with you as much as usual when you guys were kids.

So, because of this, Jōno had decided to take you with him to the Hunting Dogs, with Fukuichis (EW) Permission.

Now, he is currently showing you around the area of the HD, gripping the farther side of your shoulder so you don't run off somehow.