Sonic Channel staff on their blog:
It is Sticks planting the plucked spring flowers in watering can!
Sticks, who has lived her life in self-sufficiency deep in the mountains alone. She’s alienated from the civilization and also doesn’t seem to understand well the correct ways of using the tools. Their uses are not bad, though….
All of you seemed to have a hard time because this time, it is a character who appears for the first time. However, due to the images of watering can and tulips, we received many answers saying “gardening!”