Four paths here:
* Momiji has a burn-out juggling both, Kou gets depressed not having been more "forceful" in keeping her staff dedicated - though keeping staff happy sometimes compensates for this [actual interesting storyline dealing with overwork]
* Hotaru gets hired at EJ literally the same job as Momiji and just nails everything effortlessly, ticking Momiji off [Momiji may storm out]
* Hotaru somehow swipes the LN from Momiji, again effortlessly [Momiji may storm out]
* Momiji realizes she's heading for a burn-out, gets introduced to Hotaru by "chance" (event with Aoba), and introduces Hotaru to the LN people. Hotaru then proceeds to knock that one out of the park effortlessly, and yet still fcks off to France after because meh [actual interesting storyline dealing with overwork, with a side of "let's actually solve this"]
Off the top of my head.