The only common things I could recognize that Bella is going to take MC to the same diner as the one in WIAB, and Vicky's family name is mentioned.
Is there anything else I missed?
I am not sure, but I think I saw Mila on a wine bottle in WIAB at the restaurant. So is this just an Easter Egg, or a possible foreshadowing that she'll become a model?
Edit: After replaying this scene, I've come to the conclusion that this is most likely an Easter Egg. Due to the fact, that both Bella, Summer and Mila have a name for a drink. There is still a possibility of it being a foreshadowing tho but probably not
Edit 2: I also believe that Miru and Ayua are related. There are a few indications towards this, the first one is that the MC in WIAB states that Miru's fighting style is way too special for any ordinary fight school. And the second hint towards this theory is, that Ayua literally said: "But my family has their own fighting techniques". I personally believe that Miru is one of Ayuas cousins