The player, who can choose to be male or female, enters Tracen Academy as a Rookie Trainer to train horse girls for the Twinkle Series. In the main story, they take over Team Sirius from their mentor.
Various girls have different affectionate nicknames for the Trainer, such as "Traicchi" for Vivlos, "Danna" ("boss") for Inari One, or "Molmot-kun" ("guinea pig") for Agnes Tachyon.
