DekaPai [English], a Dirty Pair hentai doujinshi, by Skirt Tsuki
Lol ^^ OK, so, the two Dirty Pair heroines need to catch a gone-rogue AI, and to distract its attention they start a sexual prowess contest. Something like that This is a huge WTF, and a very funny one at that
Thanks to whoever released it, quality nostalgia trips are great ^_^
By the same artist, I also share KY Dirty Pair 25th Anniversary , AEUG At Night and Uchuu Seiki