here's some ni-ki fics :v

wonki:
https://archiveofourown.org/works/37560640 (so good. all the feels)

https://archiveofourown.org/works/38171257/chapters/95362609 (vampire wonki>>>)

https://archiveofourown.org/works/44021215 (user vintagepoet i worship the ground u walk on)

https://archiveofourown.org/works/51882394 (user vintagepoet i worship the ground u walk on x2)

https://archiveofourown.org/works/49027618/chapters/123690160 (unfinished and not sure when author is updating)

ni-ki centric:

https://archiveofourown.org/works/42149523 (user vintagepoet i worship the ground u walk on x3)