From what i know... Space is Ichiji sousaku (original) doujinshi - works not based off any existing manga. It is the author's self-published works outside their professional career.
i can't believe you guys can't tell these chapters are from doujinshi. It kinda obvious when you notice the publication date and the author's forewords. He/she also used their circle name KOU. in their doujinshi.
From what i know...
Space is Ichiji sousaku (original) doujinshi - works not based off any existing manga. It is the author's self-published works outside their professional career.
i can't believe you guys can't tell these chapters are from doujinshi. It kinda obvious when you notice the publication date and the author's forewords. He/she also used their circle name KOU. in their doujinshi.