"Hey guys settle down we're here to tell our story so the world can know,"
"Just how awesome we are am I right Chuan?"
"Yes San we are awesome as you say but I think our brother wished for use to tell how we came from the Elemental nations to our new home."
"Thank you Baygo you are always the most polite of us."
"Hey, Hotaru how come you get to tell the story?"
"That is simple San, I'm the oldest."
"Only by an hour Hotaru, we were all born the same day remember."
"True but he also drew the short straw as well Chuan."
"Oh yay, I forgot about that, forgive me please carry on."
You know what forget it lets just start the story I think all this talking kind of confused the readers for a bit.

Chuan is Chinese for great river Waterbending Master/Bloodbending/Water Healing
San is Korean for mountain peak Earthbending Master/Metalbending/Lavabending
Baygo is Filipino for strong storm Airbending Master/?bending
Hotaru is Japanese for firefly Firebending Master/Lightningbending /?bending

The CMC and Gabby are aged up to eighteen.

Sweetie Belle and Chuan
Apple Bloom and San
Gabby and Baygo
Scootaloo and Hotaru
And yes the sex rating is there because the four couples do get it on after all the guys are stuck there forever and the girls are old enough so why not.