What an interesting find this is!
Now that's the NTR of a healthy person!
And there is an impressive amount of content! It's a bit of a slow burn. Still haven't gotten through to the end. Saw this for the first time, but it's day two now and haven't finished the content yet.
I don't mean to be ungrateful, but this is another 18- update. Unless I screwed up the walkthrough. Still interested in the story though. But the harem building should not be forgotten. With scenes ;)
How is this "My Sister & I" You must be registered for see element. and this "My Sister & I: Crimson Love" You must be registered for see element. related and which should I try first?
A little bit of silly advice:
The first release should introduce at least a few good looking characters to lure players in.
It needs at least one hot scene to pull in the hook.
That and at least half an hour of gameplay.
Advice from a nobody who's done absolutely nothing ;)
I'll suggest games with more game mechanics than story:
Strive for Power and Strive: Conquest.
Fort of chains
No Haven
and, of course, the good old Slave Maker.