A crossover parody you'll best appreciate if you're old enough to remember the characters they're parodying.... Tomoe Hotaru AKA Sailor Saturn, more morbid and gothloli than usual and stalked by tsundere NGE Asuka, lives neglected on cup noodles until lolicon(?) Youko Kurama and IY Miroku crossed with his tanuki familiar adopt/babysit her. There's also a catgirl. And tentacles. And a Ranma hot springs parody. And some pretty straightyup Inuyasha plot lampoon at the end.
I feel like a lot of younger fans, who didn't grow up with the 90's source material, won't realize how utterly hilarious this is. Don't get me wrong, it's funny in its own right- but the fact that it's basically a crossover fanfic lampooning all of the popular 90's mega-franchises is what really makes me giggle. And with the possible exception of Miroku, the chars parodied were all HUGE fan favorites at the time. A few still are.
Kamisama Kiss is a bad Yuuyuu Hakusho/IY fanfic too, but unlike it, Gugure is self-aware... And hilarious.