Mashiroiro Symphony -Wind of silk- - Vol. 1 Ch. 6 - If I Don't Act Stubborn...

[MangaDex]

 

[Andasen]

Sana has always been the best girl in the game

 

[Kucai]

For those who aren't quite happy on the manga version of the ending
A full game dedicated only for her was released last year
https://store.steampowered.com/app/2737980/Mashiroiro_Symphony_HD_Sana_Edition/