Read the First part if you haven't yet.
(From the Good Ending path)

After accidentally coming to Equestria by getting caught in the path of Celestia's spell... Christian now lives with Fluttershy for nearly 2 years and was happy to be with his pony daughter. He even made friends with Dash's dad, Rob. But things are getting complicated for Christian, as he wonders what life has befall from his beloved sister... As he goes through his new life at Equestria... he will soon finds the true meaning... of what "Family" is...