Noctic and Prompto broke up because of Noct’s engagement to Luna nether wonted to end things so there’s still a lot feelings between them. Then on the road trip Prompto starts fall for Gladio who returns his feelings they start dating Noctic is not to happy with this which leads some arguments which Prom feels very guilty about. Then everything in Altissia happens Gladio and Noct are at each other’s throats. So when Noctic attacks Prompto yelling that it’s all his fault Prompto thinks he is talk about everything with their relationships and stops dodging his attacks of course the illusion fades when Noctic lands a blow leaving he to relies what’s happened and Gladio’s reaction

Where this go’s is up to Anon