Now that was a cute chapter, and I laughted knowing that Utau won the first ramen contest XD I wasn't really expecting they'd have such a development in only one chapter, but seems like Encore will take a form similar to oneshots, which is very nice and reader friendly for extra chapters.
Most probably any serious development of Amuto will be left for the final chapters (oneshots), so make your bet bassed on that. For me, I'd like some Nagi x Rima for next time.