In this game, the way to get the cellar stairs is through store purchase, through activities or festivals.

1. Buy through the store: In the game, the cellar stairs can be bought in the store. You need to buy a cellar in the shop and turn it into a cellar staircase.

2, through activities or festivals: cellar stairs may also appear in some activities or festivals. This requires playing games in specific activities or festivals or under certain conditions.