I don't understand anything, this is the most convoluted AVN I've played yet, nothing you do seems to add up in any significant way to get anywhere with the LIs. To say it is a frustrating experience would be quite the understatement.
But...on the spirit of constructive criticism....may I suggest the developer to put the name of each LI next to its icon in the "?" menu?, every hint in it refers to another girl's reaching a certain number on "love" and other metrics, but I can't tell which girl I have to focus on if I want to pursue certain paths if I can't tell them apart easily.