Last maid one is on the morning of the 7th day if you are going for ending B or ending A, it triggered auto. I have a similar problem with the maid scenes, cant seem to find the fourth pic, tried following the guide provided a few posts back, still cant find that image.
Maid 4 pic, Toilet piss scene
Maybe it is I can`t say I played it free on my first play. When I played the second time I tried it and I haven`t get it.
My thought why not; not proved because I haven`t played further after I end the Game the second time (Ending C & D get):
1) On Day ? I meet her in the Kitchen at night. - I mean the Day you can have sex with the Subccus maybe you must miss here that you can be with the Maid on this Day later. (On my first Play I haven`t had the Subccus played free)
2) You have to hold your piss till the Day to play it free.
3) You must play other clothes till the end in your play (so you must repeat all scenes you have in Gallery) and after that you can get it. (Maybe the other Maid Outfit or something)
I said before the walkthrough helps a lot and I am not sure if all Information are there to get 100%.
So when I remember correct there stand nothing about the Teacher bag from Day 3. The Teacher tells you on Day 5 about the missing bag (Day 3) in my plays I found no bag and so on.