4,5 it was a beautiful story I liked the pace and the characters' development!! Oh and the friend's mom was super cool I love it when there are great women in yaoi, how they solved the kids' fight for example was sooo refreshing, I liked ayumu too, his relationship with yuuichi and ryou were well-developed, and I also liked a lot the main characters' relationship I think they're really compatible and cute, especially ryu his childish/needy side is adorable I find his possessiveness really sweet instead of the overbearing one common in yaoi, he's just the right amount of sexy :p
Hinadori wa Shiokaze ni Madoromu