Way back in 2002, when I first discovered Ayu, I fell in love with the song
M (which remains, to this day, my absolute fave Ayu song

) In any case, I noticed that the arrangers of the song were HAL, a group of producers who also happened to have a group on their own, fronted by a female vocalist named HALNA. For the longest time, I was really confused, because I originally thought that Ayu was also the vocalist for HAL, just going under a different name

LOL
Take a look at the similarities~
HAL's DECIDE single cover
Ayu's Evolution single cover

HAL the music group disbanded in 2003, with a supposed statement by HALNA saying she wanted to "get out of the spotlight"~ However, HAL continues to be music arrangers and work with Ayu, most recently on her SECRET album. My question now is this~ Did HAL the music group disband because of too much competition/comparisons with Ayu, especially in the case of HALNA? A brief listen to her vocals shows extreme similarities to Ayu's, and of course her styling seems to mimic Ayu's as well.
What do you guys think?