...Did you really just try and PM Kyaami just asking "How do you tune!?"
Because that's frankly a tad presumptuous and rude.
She's rather busy at the moment, with a lot of things more important than UTAU/VOCALOID, so perhaps she has little time to explain or do a stream (she does those, by the way, I don't know if Nico saves them or not so I couldn't point you to them); so I will in her stead.
It's an art of listening and replicating. Try singing the song for yourself-- what do you do? Mind, this works better when you have had a little training in singing, but all the same... If you're not so good, you can look at a cover.
It's really hard to explain, since when you know, you KNOW. Mostly she makes a point of using four point pitchbends and strong, fast, natural vibrato in the right places.
I might do a stream later this week if I've got time, since this isn't very helpful because I'm rushing.