As the title implies, this series features a pair of characters per episode. Each DVD has one music video for each character, plus one part of an eight part story. Annoyingly, the music videos are for the short versions of the songs, not the full versions... to get those, you had to buy the Twin Collection CDs.
Atsushi Kisaichi
Fumihiko Tachiki
Hideyuki Tanaka
Hiro Yuuki
Ken Narita
Kenyu Horiuchi
Mitsuaki Madono
Mitsuo Iwata
Nobuo Tobita
Nobutoshi Canna
Show Hayami
Takehito Koyasu
Tetsuya Iwanaga
Toshihiko Seki
Toshiyuki Morikawa
Yumi Touma