itch.io

It shows the list of girls youve met. 

It shows data/facts on the girls youve met. (Age, Gender, Height, Weight, etc.) it can also be for hooking up with them. (I think u can only do Brandy if youve hooked up with her during lunch.  But ask the owner for a better explanation if this didn't help)

the heart symbol will have a number on it reflecting the number of girls you've... completed... for your demonic contract - the individual pages for the girls offers information on them and some have pinups you can swap the phone background to, and you can do repeatable events with Brandy and Sabrina when you've completed their current content