It's an adding & subtracting game.
There are three rounds.
Furawatchi starts each round with no flower crowns.
Furawatchi is playing in a field of flowers, making flower crowns then giving them away to friends who visit her. If she pops up alone, count how many flower crowns appear beside her, and add this number to the total. If other characters appear on screen with her, count how many flower crowns her friends are wearing, and subtract this number from the total. The answer you have to supply at the end of each round is the number of flower crowns Furawatchi has left.