Thank you for your kind answer to my question! ❤️
Regarding your implication that Derek might be two-faced, I've been thinking that Derek might be the bottom.
Then I suddenly wondered if Derek and Eli were both acting. For example, Eli might be the mastermind, and the original plan was to introduce some stimulation, with Derek cooperating (one possible outcome is that Eli is genuinely attracted to Derek, and another is that Eli is so determined that Derek has no chance). Or, for example, Derek might be the mastermind, but his real target is Ryan, and one possibility is that he ends up with Eli, another is Eli is eliminated.
As far as the demo is concerned, the animation is the highlight, and the character designs are quite unique, seemingly without any substitutes yet.
However, Derek's pants are indeed quite flat, and Ryan sees something strange about Derek's lower back when looking through frosted glass. Also, Derek seems prone to tripping when he lifts his foot in the bathroom without leaning against the wall; I wonder if these issues will be addressed in future updates.