Man I would love to see a full-fledge story of this, Mori has such an amazing style and art she would do fantasy so well and this here proves it.
In truth I think she really should do fantasy, I love the way how she puts that magical touch on her slice of life stories even then being based in the real world but I think she really should do something like this here.
This oneshot was made now in 2020, maybe there could be a chance that she wants to do fantasy