Opening Credits:
"Colorless" - Tsuneo Imahori
(ahahah... yay for Trigun BGM. and this is a great piece too. XDD)
Waking Up:
"I Think I'm Paranoid" - Garbage
(AWESOMESAUCE 8DDD)
Falling in Love:
"Carrot and Stick" - Tsuneo Imahori
(once again, another Trigun BGM song. XDDD lulzness)
Fight scene:
"Dead Disco" - Metric
(OMGAWD YAYNESS <333)
Breaking up:
"When You Were Young" - The Killers
(one of my fave songs by this band. AND it mentions heartache XDD)
Getting back together:
"Unavoidable Battle" - Shoji Meguro
(the hell? The boss theme from the Persona 3 video game? hawt damn, my guy must be badass XD)
Secret Love:
"My Ninja Info Cards" - Kajmaster Kajet
(... Kabuto?! O____O; EWWWW!)
Life's okay:
"Kimi Iro Omoi" - SMAP
Mental breakdown:
"Nothing Lasts Forever" - Maroon 5
(what a fitting song for this topic XD)
Driving:
"Friend" - Tenpei Sato & Rei Tateshi
Flashback:
"Todokanu Omoi" - Sailor Starlights
(holy shiznit a SM song XD)
Partying:
"Camidaso" - PANIC! At The Disco
Happy dance:
"I Want To Break Free" - Queen
(... happy? this song isn't upbeat...)
Regretting:
"Master of Tartarus" - Shoji Meguro
(and ANOTHER p3 BGM)
Long night alone:
"Stayin Alive" - The Bee Gees
(.... don't ask)
Death scene:
"Fur Elise (techno remix)" - DJ Mystik
(... awesomesauce?)
Ending credits:
"Bubbles" - Dressy Bessy
(..... wtf?)