The episode was actually very faithful to the manga lolOh that was right. Last episode ended by showing altus Paris but we didnt get to see any of it. ep 4 started by showing their cart had already arrived somewhere lol And suddenly there was a ball. Why ? Who sent the invitations ? And where does it take place.? Feels like director skipped half a volume worth of manga material.
The first 10 chapters or so move very quickly with very little world building and I'm not sure how much of it is intentional or just an oversight by Mochizuki