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.
#1: "Gold Rush ~21st Century's~" by Olivie (cv. Takehito Koyasu) (ep 1) #2: "Kimi no Tame ni Koko ni Iru" by Randy (cv. Nobutoshi Canna) (ep 2) #3: "lovesick" by Zephel (cv. Mitsuo Iwata) (ep 3) #4: "Taiyou e no Kaidan" by Julious (cv. Sho Hayami) (ep 4) #5: "Sen-nen no Yakusoku" by Clavis (cv. Hideyuki Tanaka) (ep 5) #6: "Kiss shite ii?" by Mel (cv. Yumi Touma) (ep 6) #7: "Illusion ~Mabaroshi no Chou~" by SeiLan (cv. Tetsuya Iwanaga) (ep 7) #8: "Together ~Michi Naki Michi o Susume~" by Victor (cv. Fumihiko Tachiki) (ep 8)