Lelouch wants to take his favorite Black Knight out for ice cream at a place not far from the Black Knights hideout. However, it doesn't cross his mind that he's practically asking you out on a date... especially not with him dressed the way he is. He's dressed relatively casually, it looks nothing like the outfit he wears as Zero, but it still looks very good on him... and he's also chosen not to disguise himself, just for you. He wants you to see his face.