[Moody]

Not sure if this helps but here's a translated Linear note from Ayu about the song, got it here. ;-)

13. kiss o' kill
words: ayumi hamasaki
music: Tetsuya Yukumi
arrangement: Keiji Tanabe

ayu: as for kiss o' kill, I love Tanabe-san’s arrange. It “hurts” from the introduction when kids are making noises. You pass by a park and hear playing kids’ innocent voice, it is warm but makes you feel sad or miss something on the other hand. This song has that kind of image. And I feel confession-like feeling throughout the song. Because we become adults, we lose things, throw things away, earn something, learn something we don’t wish to learn, see things we are not supposed to see… through those things, we learn means to protect ourselves smoothly, but it can also hurt other people… innocent kids’ voices and the confession-like part of ourselves as grown-ups. Both are present in this song, and I think it really hurts.

mister kaz: Kids’ gaya (voice) joins again and again?

ayu: Originally there wasn’t much, but I thought it was the main point of this song.

mister kaz: Contrarily, kids actually have sides that are more cruel than adults think they are.

ayu: There is cruelness made out of innocence, too. That’s why it feels warm but also makes us sad.