Ryouko Shintani - Nani ga Nani de Nani nano...
from Katte ni Kaizou Original Soundtrack
ending of Katte ni Kaizou OVA
dude i thought this was lost FOREVER but fortunately younger me actually had enough foresight to think "hmmm maybe i should download this"
i remember some East Asian guy (can't remember for the life of me if he was Japanese or Chinese, probably the latter) uploaded this on YouTube around two years ago but then deleted his channel later on. as far as i know, that was the only upload of the full KnK ending.
this album in particular seems to be pretty rare, as Kaizou is so damn irrelevant (EVEN IN THE 2000s/2010s) that not many people cared for uploading it. there's like one torrent of this album but no one has seeded it and i can't even get the metadata for it.
since you bothered to read this, here's a fun fact: did you know that the Katte ni Kaizou manga actually has an official translation... in SPANISH? and that it's called LAS GUARRADAS DE KAIZO? i will never forgive kumeta for this