What is this anime?

Right well i remember when i was younger that i used to watch some anime and i have nooooo idea what the name is in actual fact i dont even remember much about the anime and its reallyyy pissin me of all i remember is that this boy went into this cave well i think it was a cave that he wasn't supposed to and some how awakened a sort of witch or something and now hes like in his teens and shes like following him i think and i think he lived with some other girls as well lol i no thats not a lot of info but if anyone has any idea please help because its really bothing me lol thanks x