Kodomo no Omocha

The story of super hyper child star Sana Kurata. Her mother is an award winning writer who has strange hairstyles and hats in which lives the family pet, Maro-chan the squirrel. Her manager is, as she describes him, Sana's boyfriend and pimp (though Sana doesn't know what a pimp is). At school, her class is in chaos as the boys, under the leadership of the unemotional Akito Hayama, terrorize the teacher who is unable to do anything against them as Hayama is blackmailing her. (myanimelist.net)