There's a movie (or TV drama) about a fat family moving to a place where everyone is concerned about how slim they look.

In the school, students need to ride a bike while having class. The family own a restaurant, but no one eats there because they are selling food high in fat. In order to fit in, they sell light meals to attract customers. The mum tries to lose weight to wear those small size clothes. The little fat boy falls in love with a girl in his class, the girl's mum is really concered about weight and a perfect body.

Anyone watched this before? As far as I remember, it's a French movie (or TV series).

I haven't finished the whole movie yet, please help if you know the name. Thank you so much!