I have the same question. I played the demo but seems that currently there is only one option to top, so hopefully there would be more.
Viewing post in Monster Souls: Chains of Chimera comments
I mean, that works. Having monsters do the riding adds an additional layer of variety to just getting dicked, I think.
There are also the scenes between the MC and his teammates. Since the description did not specify what 'bang your buddies' means, I assume that we can have both more top and more bottom options...?