to give
Giver は Receiver に Object を
The verb
This structure identifies the giver as the subject (marked by は or が) and the receiver as the indirect object (marked by に).
私は友達に本を
I gave a book to my friend.
弟はクラスメートにプレゼントを
My younger brother gave a present to his classmate.
When the receiver is a member of the speaker's 'out-group' (like a stranger or an acquaintance) and the giver is a member of the speaker's 'in-group' (like a family member),