So far (ch2) Ai has shown some tsundere-ish attraction toward Miyu, and Miyu was distracted by Jahy-sama-lookalike's boobs, and there's a voyeur onee-san, so I'd say at least a Subtext tag is warranted.
Also random note (ahem) - as a given name Safi ("pure") is masculine though hers might just be a contraction of one of the feminine forms (esp. if her full one is the rather longer Safiyyah which the Japanese might struggle with, idk). It's also used as a family name in the Levant and tribal name in Afghanistan but those are highly unlikely to be relevant as for whatever reason everyone in this series goes by their given names all the time.
...I'm a nerd for etymologies, don't judge me.
Safi looks like Konbu enjoyed drawing Jahy-sama so kept using the design... oor vice-versa, liked Safi so much and gave her design it's own series, not sure if dreaming prima was before or after the Jahy-sama manga... Regardless, Konbu has definitely become one of my favorite mangakas of all time, I love the fact they do awesome ecchis plus hilarious CGDCT, when the two are combined its like its more powerful!
Safi is considerably curvier than (even adult-form) Jahy-sama mind you, but yeah otherwise the designs are very alike. And if memory serves Subaru from Ichiban Oppai has both a tan and similar ear-like hair tufts...