Sorry for not replying sooner, for some reason I didn't get any notifications about new messages!
Looks like you're covered when it comes to the CG unlocks thanks to Lachy15's kindness. I'll make an official guide at some point... As for Griffin, he's the last main character to be introduced and will be heavily involved in the next game release. He has some interesting ties to Matt, in fact...
And speaking of Matt, you can't hook up just yet. He has a slightly slower burn than some of the other characters. But I am going to include a lot of hot stuff for him in the game to tide us over until we can get his pants off.
He's a very popular subject for the Patreon galleries, so I have a lot of practice making sex scenes with him. So I'm pretty confident the ones with Connor will be worth the wait. And since I made you wait so long for a reply, here's one of him double penetrating Riley during a foursome with some actor frat guys. He's quite the sweaty boy...