From time to time, dimensional portals open in the Demon Capital, bringing all sorts of unusual visitors! Gensokyo! Type-Moon! A Certain Magical Index! Otherworlds!
Luo Zhi came alone to the dangerous Demon Capital to find a way to cure his younger sister, but what is with all the different girls suddenly appearing by his side?
An angelic nurse, Ikaros; Misaka Sisters, a hundred million human-shaped tasers; and lots of little red-eyed girls. The most awkward part is that Luo Zhi is a doctor by profession, so how did he accidentally become emperor in Akame ga Kill? And what's this about a cosmic fiancé? A demon's brother-in-law?…
"Big Brother! Do I really have this many sisters-in-law?" His younger sister, Luo Ling, smiled, hiding a cleaver behind her back.
Utterly bewildered, Luo Zhi was doing something unspeakable with his little Lefty (a Parasyte)…
(This is a crossover story featuring Type-Moon, Black Bullet, A Certain Magical Index, Gensokyo, Akame ga Kill, High School DxD, and more. There is transmigration, there is fighting, and also…)