Finally had the opportunity to run this game last night and it was so wonderful! The players really enjoyed developing their sibling dynamic and the world together (a lot of them were new to games that ask for intentional collective decision-making around setting elements), and the mechanic for seeking insight/question asking in particular levied the narrative into some alternatingly hilarious and intense cathartic directions. This had been planned one-shot, but we'll be expanding into a short campaign.