It didn't? Oh sorry, but i had this feeling of taking itself serious throughout the whole series. It wants to be a psychological thriller in which the personalities are manylayered and electic. But they're not. Instead of that they are all cliché characters like caricatures. The "charisma" of Johan wouldn't even convince a dog to sit for him.
Plotpoints are just random events. And Robert was the biggest plot tool ever since creation of motion pictures, topped by the joke that he was in the Kinderheim-o 511, too.
This anime wants to be intelligent, tense and subtile. But fails at all points greatly.
Oh and one more thing: 9mm bullet + child head @ 50 cm distance = NOT STUCK IN YOUR HEAD.