Keifuku-san features the adventures of a young girl in a railway conductor uniform and a floating manta ray as they explore an otherworldly space. The short features direction by Tatsuki, animation by Hirayasu, and art by Yukko (all members of animation studio irodori), as well as the voice talents of Yumiri Hanamori.

在兽娘动物园电视动画播出完毕一周后监督たつき在视频网站放出自主制作的短篇（12.1话）。讲述了充满悬念的动物们的新故事。