"
Lefi and Yuki is kind of a couple now."
They are? Nahhh, I had a bad feeling, when first girl turned out to be a loli. Author. Why didn't you make her look older? A short petanko is fine, if you're into it, but older! (You never see legal flat chests outside of harem tags anyways. For Justice and equal rights! Its doesn't have to be bunker busters
all the time. Back at the topic
Add some visual features, that make us at least say, "Ah, she looks like a (still quite) cute 18-22rish woman." Add some height, slightly more meat and a tad of curves around the hips and shoulders and you're done.
I have to read Lefi's description in the WN now. Maybe there is still hope. -_-