Once upon a time there were two brothers. The older brother, who has been busy with work, tried to forget his memories with his father by offering flowers “Forget-me-please” (Kanzo) to his father’s grave. The younger brother cherished his memories with his father and offered flowers “Forget-me-not” (Shion) to the grave. The demon who protects the grave was impressed with the younger brother’s actions and gave him supernatural powers as a reward. The younger brother became more and more happy after that.
It is an episode that appears in the narrative literature “Konjaku Monogatari Shu” at the end of the Heian period.
The conclusion of the story says, “If you are happy, plant Shion, and if you are worried, plant Kanzo.”