Started Goodnight Punpun, read the first few chapters. I'm very intrigued but wtf am I reading??

The teachers in the school are like on drugs or something...also why is Punpun and his family a bunch of cartoon bird things? And why does no one else even acknowledge it??

???? imagine watching porn as a kid and then this guy comes on, talking about how horrible life is and admitting to murder x) this manga is gonna traumatize me, huh