Brilliant game! I am enjoying it very much. I must say I am not into bdsm kink but it's very well balanced, has a lot of teasing and I truly believe this headmaster is doing the right thing for the girls :-)
I like the free roam approach, it's far better than linear visual novel, so that's a big plus.
I was a little concerned about graphics, it's not the usual near perfect style, but I've grown to like it very much and I would recommend this game to everyone who still hesitates.
Great job! I would like to see it developed to the full version some day.