Yes, from Yu Yu Hakusho.
The song is its 4th ED Theme performed by Takahashi Hiro.
It's just really weird for me to be like this over a almost 10 year song.
I just want to return from my childhood.
I wanna have a cover of this song too but I don't have microphone.. and of course, TIME.
So found this from Youtube.
SONG PERFORMED IN ALTO SAX
You can listen to it if you wanna relax.