Aokana - EXTRA1, the official Mashiro afterstory for Aokana: Four Rhythms Across the Blue, is coming to Nintendo Switch. It will include exclusive scenes not featured in the original PC version. A release date and pricing info has not been announced.
It has currently only been confirmed for Japan, but it seems likely the visual novel will also arrive in the west at some point in the future. An English localization of Aokana - EXTRA1 is available via Steam, and the Switch version of Aokana: Four Rhythms Across the Blue eventually released worldwide, so all signs point to it happening.
Check out the Japanese box-art for the physical edition below.