Intensity of the first 4 episodes is as follows (no spoilers of the story itself):
[spoiler]Ep 1: Fucked up at the very start, then mostly calm and cute.
Ep 2: More of the same, but one character becomes scary.
Ep 3: Oddly terrifying.
Ep 4: Same as ep 4, but then the ending = wat!?!?[/spoiler]
And of course, much more will follow. Bear in mind that this series is pretty psychological and will confuse you for most of the series. Don't worry, you're supposed to be. Honestly, overall, it's a favorite of mine. Enjoy, gutter sluts.