[ It is a little uncomfortable, but it has nothing to do with Piper, at least. Since she seems genuinely curious, Adrien continues, meeting her eyes (since it's easier for him that way). ]

I ran into a Santa, actually.

[ He decides that maybe he can leave out the part where he abused his powers as Cat Noir to basically turn into a teenage grinch. ]

He helped me a lot and convinced me that I should go home, but everyone was already looking for me and had the wrong idea about him. Even Ladybug.

...It worked out, but--long story short, he got akumatized, and we basically had to save Christmas.