Les P’tits Lucas 2002 one on netflix

After the departure of their parents, the Lucas kids are on their own. Amandine, the eldest who is only 15 years old, takes care of her little brothers and little sister. So that their family are not separated, taken by social services, they hide to everyone they were abandoned. Nicolas, a new student, arrives at school and falls for her. Gradually she will trust him, they all come out and admit it all.