A short fan art series of NDTwofive's Monolith-tan and Ecologist-tan:
pixiv #76539116 "»":[/posts?tags=pixiv%3A76539116]
pixiv #76427888 "»":[/posts?tags=pixiv%3A76427888]

Also ND's Spetsnaz-tan:
pixiv #74830594 "»":[/posts?tags=pixiv%3A74830594]

...and a mysterious passerby stalker:
pixiv #98138798 "»":[/posts?tags=pixiv%3A98138798]