While a specific "deep blog post" for Chapter 2 Update 1 isn't listed as a standalone article in recent search results, the developer's communications on Itch.io provide details on the development cycle for this phase:
Girl Galley Grand Line – Ch.2, Update 1: “Boy D...” – New Twists and Tensions Girl Galley Grand Line -Ch.2 - Update 1- -Boy D...
Thus, Girl Galley Grand Line likely follows a young female chef/captain and her crew as they sail the Grand Line, searching for rare ingredients, ancient recipes, or the fabled "All-Blue." While a specific "deep blog post" for Chapter