So I WANT this to have a triad ending but I'm expecting an inconclusive non-end where the status quo reigns.
I think it would end the same way the trio from Kindred Spirits ended, with Tsukasa and Washio together and Kotooka as the person who help them be together. It's way too obvious that its going that route tbh. The hints about Washio's first love wearing a lame takoyaki shirt, hints about Tsukasa looking like a little boy in her younger days and her taste for food in her apparel and the part about Kotooka being the only one who understand the feelings of both of her friends.
No, in the later chapters (the raws),it was shown that the takoyaki kid was a real guy lol, and he was the one who made Nadeshiko wears pigtails now.