This belongs in the Helper Monkey area.... but you're new and us RPGfan people are shockingly independant.
Um, as far as I know there is only one ending for same sexy couples. And they give more of the "bromance" vibe, though people looking for that sort of thing may read otherwise (like how many of these fan-relations work, but I guess that's what freeing and funfun about SO2). The second question can be answered by YouTube or a Gamefaqs topic (IIRC) that actually briefs on the endings.... mannny really aren't that exciting, and I'm glad they abolished the system because, fo such a short title, not that many really get their due development let alone PAs (worst yet, a lot of character's have to get these endings through battle relations insteadof fucking around and getting to know peeps in PAs....fucken PAs, hey're awesome and awfyl).
I hope that made sense, I'm kinda drunkr.