38-48 are from a series called "Botepuri Kanda Family", by Qoopie (Circle "THE SATURN"). Use those as clues, look around, and you'll probably find the rest of the lot.
"Yo dawg, I heard you like impregnation so we put a chick getting impregnated into a pregnant woman so you can jerk off on this and make your floor pregnant. Oh wait."