Kou Yoneda said this quote
“ The moment he laid eyes on Kuga, I knew. There's a reason I'm doing this to him. I want to see it; how he's fallen in love with a guy, and how he makes him his own. And then what I've done will become a sharp knife, thrown right back at me.That's right. I just wanted to see.And the meaning behind the sharp knife flying towards me: Why not me? Why can't it be me? All this time, I would be lying if I said I've never wished for it, but by being merely an observer, I've somehow managed to distance myself.Kuga is a bright light, like the sun. I, on the other hand... (Yashiro) ”