This is a short term conflict in Wonder where Justin and Jack are walking to the bus. While they're waiting, Jack goes into the candy store to buy some gum when Julian, Henry, and Miles start annoying Jack. After Jack gets on the bus, Justin follows them and taps his fiddle case (it looks like a gun) and scares them off.
Person vs. Person (people).
I know it's person vs. person because it's Justin vs. Julian, Henry, and Miles.
Without this scene, we wouldn't be able to know that Jack still has people looking out for him, even though not a lot of people are on his side.
Julian quits Beecher Prep.
They're not really changed because nothing different happened with Julian.