https://deloli.booth.pm/items/6886240
This is a very good set. I'd like to get Artoria Lancer too but it's split in two and 800 yen altogether (maybe another time).

I think though that if you appreciate this kind of style that browsing the fairly expansive storefront is worthwhile. Deroli has galleries on Pixiv that serve as good previews, plus there are blowjob scenes posted on there that are likely experiments for full sets to later be produced.
https://www.pixiv.net/users/112979701