It is all canon to the russian series "The Dog".Lena and Leonidov are together and Maksimov is Lena's ex.Lena and Leonidov don't mind Maksimov,and he doesn't mind them either.Maksimov doesn't make weird or flirty comments to Lena anymore,after their breakup long ago.The dog is always with Maksimov and understands him.Gnizdilov is like in the canon a stupid and head-over-heels-for-woman married man.There is Vahtang too with his friendly self.They all work in the police.Lena is in her laboratory while the others are in the common room of the police station.(You are Maksimov.)