Seems like for the recollection, the dev saved the memory ids in this format girlID_location_hvariation, eg housewife having sex in MC's room 101_bed_h1 or 101_bed_h2 in for each position.
housewife = 101
student = 201
clerk = 301
blondie = 401
dlc girl = 701(?) there's a reference to tent sex for girl 701
Does this mean there might be 2 more girls?
MC's room = bed
master's room = sf (shifu)
hall = zl (zoulang, pretty sure now this dev is chinese)
shower = shower
home = home
reception = drink
I can't find anything for clerk (301) and the movie theatre scenes. I wonder if they're actually enabled in the gallery, but game's too tedious for me to play again to find out. They exist, we just couldn't unlock them normally by playing.
EDIT: Also figured out the rest of the scenes from construction site and movie theatre. Everything in recollection unlocked (as of v1.9).
But Aoi's scenes from DLC and Yui's in the backroom are not included in the recollection, hopefully dev adds them in the next update.