...Well, I wasn't expecting THAT to happen. Rin really didn't strike me as the sort to be okay with poly stuff, since her love for Itsumi seemed pretty possessive. Rin also seemed like a more grounded and level headed person, so learning her competitiveness is so high she wants a love rival to come back after rejection so they can properly compete for her girlfriends love is crazy lmao. She seems genuinely baffled they aren't down for this idea.
I think the story could have pulled off an elelgant rejection and we did go pretty far down that route, but I also trust the story to pull off some really funny gay bullshit on the poly route, so fuck it, why not lol