I am happy to announce that after such a good release, we have decided to add steam achievements to the game. Because I don't like adding achievements for the sake of it, we have only added 4.
Three are for the games main endings, Hoshi, Selina and Lea.
While a fourth is for an event along the Lea love route, as Lea's route is a little more tricky and precise we felt an extra achievement for her route was justified.
The update has already gone live, it is quite small around 3mb and once you have it your achievements should be un-lockable.
We are still looking into the possibility of adding trading cards, but for that we need more artwork and so it may take a little longer to add them.