Judging by all these comments and my upcoming own, indivi really needs to put a full guide in the description. As to my current issue I've got the "- Search for someone who can fulfill your dream wish." in my logbook, but I've searched every room of every area I know (New Ark City, Abandoned Town, Transylvania, Milk Farm, Deserted Base) and come up dry. Is it this "Island" mentioned in the updates? I could also use some help getting there as well.
Rinny Can fulfill Lust's deepest desire, simply ignore all her advances till you get the "Ask for??????" and you would be able to do this with all the Romancable NPCs.
As for the Island it is the Painting in the Upper New Ark, find a way to destroy the Statue, Simply sneak up behind the receptionist and then fiddle with the Statue, when time has passed the massive painting would have no one looking at it, Rest upon the Bench and the Painting of the Island would take you into itself.
I'm doing a guide for backers on my Patreon, and there is the fan made wiki!: https://lustdollplus.miraheze.org/wiki/Main_Page