[Seki(赤)][Beniiro Kaitenkikou(紅色回転機構)] ♂♀ [2013-10-13]
Code:
List of doujins:
Eikyuu Kikan (永久機姦)[2012-04-22][DTG]
Yuru Yukari (ゆるゆかり)[2012-08-12][Gap]
Zenryaku. (前略。)[2013-02-03][DTG]
Mushi Chichi (むしちち)[BE]
Code:
https://www.sendspace.com/file/q6305u
A compilation of Seki's doujins, no idea if the rest of the stories involved DTG.