Around the time the album was in production, Ryutaro was grieving the unexpected passing of his father. He dedicated the song, Bambi, in his memory, as it was the kind of song his dad would enjoy. A few months later, Ryutaro contracted Guillain-barré syndrome, which is a debilitating, rapid-onset auto-immune disease that leads to whole-body paralysis. He was stuck in the hospital for months, which halted and influenced the later production of the album. The lyrics of Sabishinbou changed to reflect the feeling of being isolated in a foreign place, and one of the instrumental tracks in the album is just the sound of a heart rate monitor slowly beeping.
Ryutaro said in an interview that this was the hardest time of his life, in a way that implied like… You know… It was mentally traumatic and impacted his will to live for a while. I could feel that in this album, fully. Especially in Sabishinbou.