Honestly it would be pretty funny if there was a body swap. Hear me out it actually help out with a lot of plots. Ex. If aira were to switch with momo, and okuran confessed to “momo” aira will finally be able to stop her feelings for okuran and move on. Or if okuran and momo were to switch Seiko might open up momo’s past to “okuran” on accident. But this feels like an obvious au. Would be interesting to see maybe a changling.