there's no extra pics for #1, #7, and #8. Artist has a pay-for monthly that has extra pics where this came from and no other pictures were uploaded for it.
https://ci-en.dlsite.com/creator/952
signed up and it barely has any content each month. you only get the one month you signed up for (can't see previous content) and he only releases about 3 pictures a month with no story or anything else. To see the previous month, you have to pay another 600yen. Not worth the cost and this message is coming from someone who bought all of his stuff.