I see also a rather different scenario too. It migh or migh not happen. Rina says goodbye to Touya and forfeits the fight saying she's only one of his godesses and later a guilt-ridden Touya confesses to him and in the end saying something big like:
"You aren't one of my godesses. You're my one and true godess"
Or anything fluffy...well, we'll see what happens, but it's going to be either:
-Yuki X Touya: no matter what shit happened they forgive each other(especially Yuki) and get back together. The godesses are backing up and though with little pain they give it up. Rina experienced love and reaches even greater heights of stardom. (30% chance)
- Rina X Touya: Yuki is putting up a fight finnally, but forfeiting in the end as being unable to cause pain to Rina and they're making up. Perhaps it migh include a more twisted drama(like the one I previously explained). But Yuki beats Rina in popularity in the end, making it as a kind of consolidation price.(30% chance)
-No-one X Touya: Touya learns the consequences of his own stupidity.
(sorrily just a 15% chance)
-Anything in-beetween:25% chance
That's my prediction.