Conan: Gin and I Are Childhood Sweethearts

[Detective Conan fan, original heroine, no CP] The introduction is incompetent (the author tried hard, but just couldn't hold it in!) The male protagonist is still Gin, the eldest brother of the winery. The timeline adopts the TV version, interspersed with movies. (If the world of Conan had a timeline.) Without further ado, please move on to the main text.