((You are regulus))

with james, Peter, Sirius and remus

james was fixing his hair and remus notice something

Remus:"prongs, since when you were an Slytherin?"

James:"it's not a Slytherin tie, it's my ti-"

remus:"it is regulus's?"

James:"w-how did y-"

Remus:"you should take it off before Sirius notice."