Ah thanks, I realized that if I scrolled down the authors page he explains things in more detail so I managed to finally finish the game! But I don't think I've managed to find all 8 cg, I got 1 from the video 2 from peaking though the doors, 1 from the library and 1 from the warehouse so I think I'm missing 3.
2 on the 2nd floor cracked doors.
1 from peekhole in warehouse.
1 from library.
1 from video you find.
1 from costume room where you only see her head.
1 from computer on three floor.
Newest one from update: Go swimming, choose 3rd choice where she teaches brown haired boy how to properly swim, go upstairs and then immediately back down stairs and examine vent.
Honestly all of them should have cg and a few of his Japanese customers have mentioned this as well as adding in "her side" to the ones the MC obviously can't see (like the tea room, other side of curtain in costume room, blonde guy scene in bedroom, brown haired in bedroom, brown haired in toilet, brown haired in kitchen, blonde in 1st floor/east side/1st room and 3rd room, brown haired in 4th room, both guys in wine room, secret room, blonde in pool, ending 4, ending 5, ending 6)
15 scenes where you either see still sprites or nothing at all.
Plus it just makes little to no sense that a girl who's so sexually active won't in bother trying to have sex with MC even though she likes him.