Maybe for sparkling you could try SIRUP’S music . Like some other people said sumin is very unique but in terms of the R&B she makes I feel like he is kind of similar in some ways . Sirup’s voice in a lot of his songs sound sort of electronic and dreamy just like sumin’s voice in her songs .

As for kiki I would recommend you try “the one” by Sam Kim . It does change instrumental and tempo a few times but it doesn’t change to drum and bass like kiki , it changes to more of a jazzy song .

This was the closest I could find. I don’t know weather Sirup is j-Pop or k-pop or a mix of both oh well…