Baekhyun's milkshake does bring all the boys to the yard.   Specifically one boy.   Specifically Chanyeol the milkshake god.   Baekhyun is mildly surprised.

Baekhyun is a stray, orphaned boy who flicks from fosterparent to fosterparent like a butterfly.   Chanyeol is a boy who has two parents, and a good heart.   Everything starts going wrong when he meets Baekhyun.   But in the same way, everything starts going right.