I haven't tried it out yet, but here's the demo straight off the ci-en page:
SiNiSistar 2 Alpha Demo:
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Edit:
On the keypad, these buttons can be used:
3 ... ON / OFF with 0 damage received
4 ... MP is set to the initial state (80)
5 ... MP is maximized
6 ... HP is set to 1
8 ... Scene retry
It's more of a proof of concept than anything. A single screen with only one enemy type, and two scenes where you can get eaten by zombies. No H-content other than some nudity when your clothes take enough damage.