I genuinely gasped when I saw her painting. Rei gets it. She turned a simple exercise into art with that little drop of blood, enough to spark interest and curiosity. We can't help to be engaged in the view and wonder 'What happened?'
I keep being very impressed by this manga. The art in itself is already stellar, so it should be difficult to make the paintings pop out but they're always striking, making the whole premise land, as we're as mesmerized by them as the protag.
Plot-wise, even if that frames the story nicely and gives him a nice goal to strive for, it's a bit of a shame that they have to part and that her lessons are already over. I hope the training arc for him to be worthy to paint her will be quick!
And thanks Daphie for translating this gem!