How did you get those two scenes with Red?
I'm not so sure about the first scene, but from what I remember, I talked to him on the balcony, and after the fight in the colosseum, I apologized, then after Red got drunk, I chose the (tease him) option. As for the second scene choose the [Go wake up the others] option(see the image below) then click on the option [take a peek at his slit] then that's it(~￣³￣)~
Just make sure you have enough points on red to unlock the scenes(｡•̀ᴗ-)✧
You apologized to him? I thought he doesn't like that! And I mean this one, because it seems pleased that Aki doesn't tried to apologize, he always saying "Don't apologize, demons don't do that"
It's very weird because the options of "tease him" and "take a peak at his slit" aren't showing up on those specific moments. And I do know I have enough points with him because he reciprocate with Aki, like he smiles or sometimes gets worried or blushes with some commentaries.
Although, I'll give it a try from scratch! Tysm!