Artist info:
https://www.pixiv.net/users/67365068
https://twitter.com/pukupuku_tr
https://pukupuku.fanbox.cc/

According to the artist, she was planning to release a R18 Gloria x Marnie doujin for Comiket 102. However, after August 31, she hasn't returned to any of her social media accounts. For the time being, only sketches from her FANBOX and a low resolution image from her Twitter account (page 36) are the only evidence left for this planned book. Since her Skeb (https://skeb.jp/@pukupuku_tr) and Skima (https://skima.jp/profile?id=126584) accounts are still open/active, there's still hope she will come back someday.

From older to newest.
1 - 13: Pixiv (Pokémon stuff only)
14 - 37: Twitter (Pokémon stuff only)

FANBOX (All posts)
38 - 57: サンタさんとの一夜 途中
58: Twitterでアップしたモザイクなし
59: 八重巫女様×影ちゃん
60: バレンタイン
61 - 62: 夏に向けてユウマリ漫画を描くぞ！
63 - 64: ユウマリ漫画 ラフ ちょっとずつだけど頑張るぞ…！
65 - 66: 漫画ラフP4、P5
67 - 68: 漫画ラフP6、P7
69 - 71: P8、P9、P10
72 - 78: お仕事しました
79 - 81: P11、P12、P13
82 - 86: P14、P15、P16、P17、P18
87 - 89: P19、P20、P21
90 - 91: P22、P23
92 - 97: P24～P29