It might be a bit late, but if anyone's interested, you can use this code in Cheat Engine to alter certain numbers, like Homura's water bottle and bed usage.
(n*2) + 1
Simply replace the 'n' with the number you want to change. For example, Homura's bottle at the start of the game has 3 sips, so the Cheat Engine code would be (3*2) + 1.
By the way, this person plays the Gakuen Abaddon - THE END IS NEAR demo and explains a few things. It's not the best, but at least it gives us a general idea of what happens in the game:
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