Their first live appearance was on March 18, 2005, at Osaka Big Cat,[4] when they were the opening act for D, Fatima, Doremidan, shulla, Kra and others.

On July 27, 2005, Sadie released their first maxi single, "Kokui no Shita no Yokubou to, Kunou no Hate ni Mita Hyakkei no Yuritachi", limited to 2000 copies that quickly sold out.

After Sora left the group in January, Sadie was featured on an Omnibus compilation CD called sawayaka sankumi with the song "Meisai".

In March, shortly after the announcement of their first EP "The Trend Killer", Kei replaced Sora as the group's drummer.

At Sadie's oneman on May 6, three days after the release of "The Trend Killer", the visitors got the chance to receive the second unofficial single "sayonara no hate".

[6] In February 2009, Sadie released their 5th and first full-length album Master of Romance; containing 4 songs previous recorded within the following year.

Tsurugi cited Sugizo and Inoran from Luna Sea, Aiji and Jun from Pierrot, Kouichi from Laputa as his main influences.