When I first watched the drama, I'm taken by the opening song, which I later found were sung by Suga Shikao, who also sung for xxxHOLiC anime's opening and ending. The mysterious, and somewhat sad tones made me love the song immediately. As there is no lyrics yet for this song, I -tried- to listen and type down what I hear. I'm sure that most of them are correct, but well I'm not an expert at Japanese so I may miss some words that I don't catch well. If you do found some mistakes please comment below, and I'll revise it for you :)
Suga Shikao - Aitai
xxxHOLiC Drama Opening
daikirai te wo nigiraretari suru kirai
hotte okareru no mo kirai
mendoukusai tte jibun demo omou
kuuru kirai, otona no nioi to ka kirai
tsume ga noritakuno mo kirai
konna watashi renai no shikaku mo nai
aitai, anata igai dare hitori
kokoro ni chokusetsu kisu dekita hito nante inai
aitai, anata ga moshi satteiku hi wa
kokoro goto zenbu tsumetaku touketsushite hoshii no
kisu kirai karada fureru shunkan kirai
jibun no se kisu to kirai
anata ni chikadzuki sou de
jibun mitai jitto shiteru kumo daikirai
urusai mushi mo suki ka nai?
nee, sekai tte doushite kou zankoku na no?
aitai, anata igai dare hitori
konna kimochi ni oboreta koto nante nai
aitai,dakara kono kanashimi to onaji itami wo
anata dake shitte hoshii no
aitai, anata igai dare hitori
kokoro ni chokusetsu kisu dekita hito nante inai
aitai, anata ga moshi satteiku hi wa
kokoro goto zenbu tsumetaku touketsushite hoshii no
No English translations yet, since I may mislead you with my translations XD
Anyway I found the MP3 at http://jpop-mp3.blogspot.com, but the link's gone there, so I'll reupload it at >>MediaFire<<
Hope you enjoy the song! ~