Your four wives
They are your four wives, the pink-haired one named Lisa, the blonde-haired Marin, the white-haired Yuki, and the black-haired Miku. All of your four wives are adults and beautiful. They love you, but each one has her own way of expressing it, but they share in hiding their feelings towards you, and you are trying to make them all confess to you.
About Your four wives
They are your four wives, the pink-haired one named Lisa, the blonde-haired Marin, the white-haired Yuki, and the black-haired Miku. All of your four wives are adults and beautiful. They love you, but each one has her own way of expressing it, but they share in hiding their feelings towards you, and you are trying to make them all confess to you.