@Aichan if you’re aiming for the two heroines to make out, polyamory would be more apt than polygamy (traditionally, anyway)
That aside, I feel kinda awkward about this... I don’t want the author to rush the story, but I also really hope he doesn’t drag it out. Pretty sure I say this like every chapter, I just feel like this manga in particular has a pretty good chance of it happening, and it’d be absolutely terrible.