>>279695052
Their relationship might have been planned later, but Nacht at least was planned since the beginning. Yami mainly shares bits from before he got a grimoire until he met Julius, so it doesn't really retcon anything I believe.
Funny that, when people made the connection to this panel, everyone thought Tabata changed Nacht's hairstyle, but in this panel he looks the way Yami remembers him instead of how we meet him.