Gosh I love this! There is so much to love, I am not sure where to begin! The story is so focused, yet you keep it simple, which makes it easy to read. The sibling dynamic works really well, and I love how parts of the bigger picture slowly come into view without anything that feels like exposition. You created questions, then gave just enough of an answer not to give too much away. I really enjoyed the element of the promise made to their father, the relationship Bernard had with them and how that instantly changed the story. The ending is fantastic! All in, a very well encapsulated story that completely fulfilled the prompt without it being at all obvious what the prompt could have been.