This is my first gallery ever uploaded.
Link to the author: https://www.pixiv.net/en/users/16669742

He hasn't uploaded in a long time. Also, the very first pic in this gallery seems to be from a different area of the net entirely where the author likely has another account at. If someone manages to find the source, then please post the link, or send me the link so I can post it, either or.

Also, the reason why images 2-4 are the same as images 16-18, it's because the latter was a sneak-peek of sorts, while 2-4 were uploaded with the full short manga (2-12) in mind. Other repeats can be thought of having the same situation.