The first part of this gallery is a two page promotional comic for Junai Trickster, "Last Today Senden-hen(宣伝編)" -- which seems to translate as Ad/Promo "Chapter".
https://e-hentai.org/s/1aa5d860a6/828658-78

The second part is promo images for Junai Trickster taken from Rocket Monkey's twitter (with a couple better quality pixiv versions)
https://twitter.com/rocketmonkey_K2/
https://www.pixiv.net/member.php?id=1229532

Rocket Monkey is labelled Do Not Tag on both COMIC HOTMiLK 2015-06 galleries, and vetoed on one of them.
(Thanks to Marzzel and shakuganaexa for pointing out its existence in the Junai Trickster Tankoubon comments)

I'm uploading this in part because, as far as I know, there's currently no way to find Last Today Senden-hen other than through comments/links, low-power tag search, or blindly searching through HOTMiLK volumes (and Rocket Monkey doesn't seem to have made much, if any, other Do Not Tag content- so people might not even think to look).

For the sake of not just uploading two images as a gallery, I'm also including other promotional images/comics for the same tankoubon that haven't been uploaded yet. Hopefully this kills two birds with one stone.

This seems like Junai Trickster's equivalent to the two page promotional chapter for Hatsukoi Delusion (which WAS allowed to be tagged as Rocket Monkey for some reason) https://e-hentai.org/s/f1e9afc214/629711-187
That ended up being bundled into the Junai Trickster tankoubon. So I'm guessing this other short comic will end up bundled into their next NTR tankoubon?
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ADDED:
p05-09 Ads/samples of Junai Trickster exclusives from Comiczin and Melonbooks
(Toranoana exclusive: https://e-hentai.org/g/1229486/48ee112a5f/)
p24-26 Junai Trickster x Hatsukoi Delusion Crossover
p27-28 Hatsukoi Delusion Extra (?)(https://e-hentai.org/s/e0be983ba6/634019-73); from Melon Twin: Primal & Giri Giri Idol Summary

ALSO: Accidentally classified this as Doujinshi instead of Manga. Fixed

Base +7, Pegasus170 +9, pesc +8, Lostalgia +8, Maxer123 +6