There's definitely possibility for this happy, fluffy story to be depressing.
I watched the anime, but I don't remember this scene being quite so intense. It seems to me that Chiya is literally a cursed child. Mom's is an urara, probably the rank 1, and broke the taboo of glimpsing on the gods. Maybe even had Chiya with one? Either way, Chiya is going to have a rough road.
Also, I'm probably overreacting, but they said this is the only team-based urara exam... Does that mean the "Urara are friends, but also rivals" will actually come into play with our four? I really don't want to see one of them succeed by beating another.