Whether we get a poly route or not, I really, really like Sayo's character and I'm happy she gets a win. Rinna is nice, especially this chapter, but I like how Sayo's love comes from more than just a physical attraction. It's nice to see someone so caring get their happiness.
If this keeps going for more volumes, then the arrows will probably come back in a new form. I'd be surprised if they were just dropped forever now, unless it was ending next chapter.