
Well, I read a little of the spoilers on the "relationships" that come to near the end.
Small Spoiler and the couple spoilers in the last section below.
Safe to say your thought process is in the right direction, the ones who end up together mind-boggles me, and learning who Jupiter was and what our MC was even more mind-boggling. If you want to know that, let me know, it was a really strange mess.
He ends up with Elle, they have a kid. Jupiter ends up with the Demon King chick and this is where I'm confused since someone says they have a kid while another person says they don't, oh well. MC's Mom and the director marry [no surprise there, we saw this coming for a long time] and have a kid. The kid parts were in side stories I heard.
Romance where lol there's only been implied crushes both between the ladies who crush on me to him on Elle but it's been a while I think it should be fine if they end up together.
Though Elle is one of those who keeps their feelings to themselves but explodes with strong emotions when stressed. I gather she probably has never experienced any feelings like this before especially due to her previous position within the angels, thus making her actions more expreme and harder for her to grasp that she is jealous and possessive.