This one is another with a long lost source. Not sure where it came from, or who created it. The story is truly hot. Lacus and Kira have apparently shacked up together—not clear if he's popped her cherry yet... probably not if the story is translated correctly. Mikhail Kaminksy, from another Gundam universe, bursts into their home one day (Apparently, he's with blue cosmos), while Kira is away, and decides to have some fun with Lacus, drugging her, forcing her to cum, giving her one hell of a good time. What makes it so hot is that she occupies that perfect border between resistance and enjoyment. She's mentally against it, but her body definitely can't resist the sex. She has a moment of clarity at the end, when Mikhail says he's about to nut, and frantically begs him not to bust inside her, but this only makes him want to do the nasty even more, and he cruelly announces his eagerness to put a baby inside her as he intensifies his final thrusts. The climactic moment is Mikhail having a seed burst, which is funny cause he's not a coordinator, as he ejaculates deep inside Lacus. Lacus is eyes closed, shivering, back-arching, and completely overwhelmed right before the moment her attacker explodes, and she screams in futility as an old man pumps his sludge deep inside her. Kira returns, and sees his prized woman on the floor, ravaged. He beats up the attackers, but he's lost the war in a sense, because now Lacus is pregnant with another man's child, and months later, he's torn on whether or not to accept the coming child. Would very much appreciate any help in locating the source... or more contents.
If you're going to hunt for it, then besides posting samples in the gundam fansites, you'll have to determine what years the items became posted so that you can use the internet archive site and search for people talking about these artworks. If those messages are archived, then you might find the artist email address. With that you can search a lot of records if you wish to be "creepy" and find the real name of the artist.