Ok, so I did it. I dressed the Martínez Gómez brothers as characters from Yume Tsukai.

I had to make some compromises, though.

Eliana is dressed as Rinko Mishima, while Rosa is dressed as (aunt?) Misato Mishima.
I didn't want to crossdress the boys, so Pedro gets the shirt and the mask from Touko Mishima, while Hugo gets the shirt and hat of Satoka Sagawa, with trousers and shoes matching Satoka's skirt and boots respectively.

There's a fifth character, the one dressed as Hajime Tachibana, which I haven't introduced yet to the story, nor will I explain yet why he's traslucent. He's wearing three toys, which I didn't copy from the original. Two of them are Claudia and Voodoo Doll from the People's Republic of Platapapán.

The scene is at the Martínez Gómez house, outside at their little grocery store. The original cast picture was taken at the Mishima's toy store, so I used the coincidence in my favor.