Warhammer 40K: My Fiancée, Fulgrim

Kasjia traversed into a wasteland world. Yellow sand and clouds of radioactive poison covered the surface of the earth, and the only human habitations left were fortress-factories behind bleak iron walls. He was determined to save it all. But before that, as the unloved youngest son of a powerful family on the planet, he was about to enter a political marriage with a female workshop worker. She was a beautiful young woman with white hair and purple eyes. Aside from being a little taller than everyone else, she was perfect in every other way. He was very satisfied. Until he heard her name was Fulgrim. What!? Fulgrim?! He was bewildered. He realized something was not quite right. He let out a cry like a Grot whose toe had been stepped on. ... Damn it, I've traversed into the world of Warhammer! And it's a Warhammer world where the influence of Slaanesh is as rampant as a flood! But, still able to grasp the situation, he remained determined to save it all. ... In the distant and dark 30th Millennium, aboard the Pride of the Emperor flagship. The La Fenice theater. Fulgrim, the Primarch of the Third Legion, once again removed her power armor gauntlet, showing off the Sagittarius golden ring on her left hand to the legionaries as if to boast: "...Thirty years. The thirty years I spent with Kasjia on Chemos may not be considered long..."