The tradition of Sabanto-Meido arose in Nippon/Japan after the widescale adoption of robotics and automation. It is a cultural movement to embrace traditional values and to counter the subculture movement of the Ko girls.
The PCs come across a wild thicket of luscious looking blackberries. They eat the berries and become drunken fools. Later they find out that the berries were part of a fae garden and were intended for fae wine. In payment for stealing the berries, the mischievious fae make life inconvenient for the PCs. Horses are untied, water skins are drained, spare clothing is drug into the water, etc.