In that case, I think Ijichi has the advantage since it would be easier to keep Anane around as an otaku partner.
I obviously don't even want to think of the possibility we'll get an open ending with no romantic resolution, but I'd accept separate routes.
That's exactly what I'm thinking. Seo and Ijichi should be a couple with Amane as a close otaku friend. Wouldn't mind a throuple (I loved Kanojo mo Kanojo) but would be so sad to see either girl truly lose.