Chii (Tanaka Rie) and Hideki (Sugita Tomokazu) - Katakoto No Koi (Duet Ver.)
Rie Tanaka & Sugita Tomokazu - Katakoto no Koi (Chobits OST)
Sugita Tomokazu & Tanaka Rie - Katakoto no koi - instrumental
Tanaka Rie, Sugita Tomokazu - Katakoto no Koi