not its not fanfiction ....they really do marry in the end of bleach manga and have a daughter called Ichika Abarai......he he h
she was born a soul reaper ichika

ichigo marry orihime and have a son called Kazui he is also a born soul reaper

both of them meet in the last chapter.......he he heh

this pic is from manga where they meet for first time in the end of manga.........he he he