Based on the anime Outlaw Star.
Here is some proof:
www.youtube.com/watch?v=aO8_wZdjzhE
Wait i mean: en.wikipedia.org/wiki/User:Staxringold/Firefly Also the last relations between Gene/Melfina and Malcom/Tam. This is all because Outlaw Star was supposed to have a second season and Wedon felt like making it.