Overall I liked it!
The quality of the writing and characterizations really sold it for me - even once I had "solved" a room I had to go around clicking all the interactables just to see those text boxes.
The battles are pretty simplistic, but that's fine for this kind of a format. It would have been nice if there were strategies other than "spam your 100 TP moves to win" (and I tried just for giggles) but it did allow the game to focus on the goofy dialog and, well, the more fun parts.
One thing you can try for similar concepts in the future, perhaps make each character the "star" of whatever section they correspond to. Like maybe the "M" boss is weak to Marcia's special or something. That said, it doesn't need to be super complex, just a bit more depth would be ideal.