I do not know why I've never heard of this series before, but I've sat and read volume 3 after randomly encountering the latest chapter's release and I absolutely loved it. I'm particularly impressed by how well the fluff and drama are executed and balanced. I'll eventually get around to reading from the beginning, but for now I'm looking forward to seeing more from this. I don't know if I'll watch the anime, though. Kinda fell off that train in recent times.
I feel safe to say that Yuu is very much in love at this point, but hasn't yet put the pieces of the puzzle together, perhaps she doesn't exactly know how to. Looking forward to see this develop.
Is her mom shipping them?
Oh absolutely. She was a hair's distance from throwing beans on the two or something.