Your dialogue choices determine the girl's affection level.
Limited "Free Editions" or demos (often versioned as 0.4 or similar) are sometimes available on indie game sites like itch.io , though these may focus on specific sub-genres like "yandere" themes rather than the standard school life simulation.
You begin a week-long relationship with your crush, Kaori-Senpai, who has limited experience with dating and relies on questionable internet advice to navigate her new role.