>>535297313
We have 3 buttons here; Story, Theater & Training.
There is no shop here, so we could argue that Training is just a replacement for the event shop.
From this we could make an assumption that we grind training materials that we spend in training mode, and when our Princess gets a specific stat treshold we get shop rewards directly.
i.e. the princess segment might not be a mini-game at all, but instead a glorified shop.