>>363477421
Except Yuki literally said it's Gacha.

>>363476171
>2021 Secrets of Santa = Gacha system with secret thematic punch for this year to be revealed

And said it uses coins

>>363475717
>The gacha machine is just a simple animation after you place a coin and click a button to spawn your gift.

I know it's not RNG, which is why I said
>(Winning used Thematically of course.)