Like all the best women, this game is
w i d e in the middle: the beginning is sort of sped up by there being so few choices and there being no scenes yet, and by the end, the slow grind for the last few stages is all there is left. Daisy is the main gate for new content, as getting her to... I believe Stage 7 or 8? begins the "secret feeding" content, which is kinda-sorta the main way to make progress with half of the grils. She also unlocks Luna, Cayenne and Hari
love
, then Luna unlocks the hospital staff. Having played through from the beginning on most versions, using text skip and skip after choices is almost required for the grind, and getting those RNG phone calls and diner encounters for more bits of progress is all that matters.