In November 1988, Spitz dropped the self-published single entitled "Tori ni Natte"/"UFO no Mieru Oka" on phonosheet. In 1989, they finally realized their dream of performing live on stage of Shinjuku Loft, a famed live house in Japan at the time. On July 12, 1990, the band performed a solo gig there for the first time, in front of an audience of 300 people. In March 1990, they released the EP entitled "Hibari no Kokoro" independently on a Mistral label distributed by Shinjuku Loft. It was co-recorded by a then-unknown producer Ryo Yoshimata on keyboards.