Fics like when the bugs meet the heart

There is a world out there where demigods don't exist. The Gods of that universe are desperate for children - desperate enough to plead with the Fates themselves. The Fates give them a gift in response - children from the only universe where the Gods stopped being parents and abandoned their children instead. The Olympians have one simple choice: win over the demigods and convince them to stay, or lose their chance to ever be parents. The problem is that these immortals don't seem to quite understand the difference between children and traumatised teenage demigods - and said traumatised teenage demigods have no idea what to do with Gods that actually want to be parents. (OR: a handful of demigods end up in a universe where the Gods can't have children. The Gods, meeting the demigods, assume that they are, in fact, young children. The demigods tell themselves that it's temporary, but... well, they may be adapting to being seen as something other than soldiers, too.)

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