The artist has a backstory to this painting, here it is translated from their twitter post https://x.com/uminonaka0x0/status/1892916145113706543

"I received an email from someone wanting to know the ending of this story, so I'll tell you a little about the background of this painting. If you find it boring, feel free to skip it."

"I recently lost someone close to me, and even if I never see them again, I think I'll feel less lonely if I think that their souls are still alive in the vast universe. This painting was inspired by that thought. I don't think these two will ever meet again, but their souls are still connected. That's what I hope."