Textbook vs Real
Textbook당신은 저의 신부입니다dang-sin-eun jeo-ui sin-bu-im-ni-da
Real내 신부야nae sin-bu-ya
Why Koreans say it this way
The ~야 ending is intimate casual speech (반말). 내 (my) instead of formal 저의. Kim Shin says this possessively, not politely — it's a declaration, not a request.
From: 도깨비 EP3