I see it going two ways.
Kase-san finally getting jealous or he is a playboy and after Yamada's panties and Kase will realise this, but Yamada won't believe her and there will be a bit of falling out with Yamada just seeing him for his TV personality.
inb4 he's a dick to justify Kase antagonizing him like she's done with all the faceless guys who ever dared to speak to Yamada regardless of their intentions.
Pretty much this, Kase-san's role, in general, has been to "save" Yamada from boys, so I expect it go down that route again.
But maybe the author can finally do something different.