Presumably, Kyoko dreamed of Himawari which is what Nodoka was probably referring to:
This Narrator mentions Ai and Yuko, among other things like making the world, and seems to be Kyoko, Nodoka's mother.
In theory: Himawari has been fucking with the timestream for a while, considering all the hints about her being from a future, she's probably one of the main culprits when it comes to timeline manipulation. Albeit, who knows who else is also from a future or something like that.
After the whole Miu Miyahara possibly being Sekai's mother thing (where does her Red eyes come from?) from last update, with Saki seemingly becoming a stalker (Miu and Saki hated eachother and loved Yuu), I've wondered if that's from an alternative route from 'Nothing Is Beautiful'. Like Miu's route led to Sekai, and Saki's led to Nozomu and Akira.
Something then maybe merged certain aspects of alternative timelines for the main timeline, which became 'Lessons in Love'.
Also, Ami now seems to have two grandmas from the Upside Down House apparently. Grandma Saki (Father's side) and Grandma Miu (Mother's side).
I'm also wondering why Yasu claimed 'Nothing is Beautiful' aka Terminal 22 is gone:
Yet Sensei has traveled to it at least twice it seems, which would imply that he's been time traveling to the past, making him possibly a lot like Himawari. ('Kyoto' takes place after he warned Sekai's mother Miu about Sekai's name, so who knows if he created a new timeline or something)
Theoretically, if one can travel to the past(s) from the present, and back again, there could be some possibility of traveling to the future(s) as well, which may have been shown through timeskips like the one at beachmas. Where Ayane, Maya, and Sensei just wound up 2 months later on the beach.
Overall: Effing time travel.
Also, kind of figured things likely weren't going to go well for Nodoka and she was probably aware of it as well:
Although, Sensei may have given her some misplaced Hope: