Replaying Eternum, there's something I've noticed in a conversation between Nova and Mr. Richards while they were on their mobiles (just before Nova's waffles, kitchen, fridge and her father's lucky mitts went up in smoke and flames). She mentions that she was watching Attack on Titan, the last episode to be exact. I could be wrong about this, but isn't that supposed to come out in Autumn this year? Or maybe she was rewatching the show (since all this happens in 2034/35, and most likely she also hacked the protagonist's laptop at the time). How curious.
Edit: And after the fire's extinguished at Nova's house and she goes to the photo studio to tell the protagonist about the door she created to enter to Ogygia, she mentions how he won his scholarship for having the top GPA in his European school (before the exact country was revealed to be the UK, in which case shouldn't that be his British school).