Ball Gown (2003)

The girl Vika and her sick mother live in their apartment, which is claimed by her mother's sister, Klaudia. One day Mila, Klaudia's daughter, moves in with Vika and her mother, who tries to establish her own rules in the house. Vika is quietly but stubbornly fighting against the new order. At a party hosted by Mila, a boy appears who becomes Vika's loyal friend.