To be one with an Alien

Story set 4 years after the end of the Animé, in Heartland. Focus on keyshipping [Yuma T. Astral]. Contains: Yaoi, MPreg, slightly gender-bend Astral, VERY explicit sex :P (consensual, non-violent) and illness related accidents (to some degree) (because embarrassed Yuma is cute *O* ) I hope you all enjoy! :) (Also: English isn't my first language, so forgive any mistakes...)