Guy's little bro pulls off a smooth protective move at the school store

A girl runs into her close guy friend (younger) near the school snack stand. He goes 'Hey noona, wasn't your birthday a few days ago? Let me buy you some bread!' So she thinks 'oh how sweet' and walks in with him.

While he's paying, her class boyfriend suddenly shows up and grabs her bread going 'Getting MORE bread? Fatty.' She reaches out to take it back from him — and that's when the younger guy grabs her arm, stares down the boyfriend super coldly, and says: 'I'll buy her another one. Don't follow us.'

She ends the post with: 'What is this feeling... practicing to be someone's younger brother-in-law??' The implication being she's suddenly seeing this guy very differently. 👀