Stability is typically found when something is well constructed, firmly established, and evenly balanced. Neither Kai nor Jonah have the desire or skill to think about all that. Instead, they find their stability in each other.
Led by her heart, Kai is wild and curious, throwing herself willingly into all aspects of life just to see what it feels like. After all, any messes made can be cleaned up later.
Jonah is disinterested in the world, constantly pummeled by his own personal rain cloud and taking careful care to leave no messes behind. He much prefers to help Kai with hers anyway.
The two friends have been hanging in this vital balance for over a decade, leaning on each other heavily as they navigate childhood, college, and all that comes after. Now in their twenties and living in close quarters, they must work out what this dependency means for them, as their childish tactics may have been masking something more all along.
