This was actually based on a dream sequence I recently had. I jotted down notes at 3 AM and shaped the septolet the next day. There may also be a related haibun on the dream as I did get some good notes jotted down in that nocturnal half sleep moment. For additional reading check out this poem by Starward:
https://www.postpoems.org/authors/starward/poem/1092449#comment-521626
