In about the Earth year 1780, a new passage was discovered between Earth and another world that was not Elfhome. An explorer group of twenty domana and sekasha were sent through and discovered that it led to Onihida. Only the domana Forest Moss and the sekasha Silver Vein, who does not look to Forest Moss, survived to escape the oni and return to Elfhome. Forest Moss has mentioned mentioned two other companions, the domana Blossom Spring and her First, Granite, neither of which survived. Due to discovery of this passage, this and all known passages between Earth and Elfhome were purposely collapsed.
Forest Moss was permanently physically damaged and psychologically traumatized by the experience. It is unknown what Silver Vein's injuries were.