LM.C was founded by maya, a support guitarist for musician Miyavi in the support band Ishihara Gundan (Ishihara being Miyavi's real last name, Gundan means 'brigade' or 'army' in Japanese) and a guitarist in his own band, The Sinners. While still with Miyavi, maya and other support members also played live shows as LM.C. Later they were joined by Aiji of PIERROT.

After Maya quit Miyavi's band and Aiji's band PIERROT disbanded, LM.C made their major label debut in October 2006, releasing...

LM.C was founded by maya, a support guitarist for musician Miyavi in the support band Ishihara Gundan (Ishihara being Miyavi's real last name, Gundan means 'brigade' or 'army' in Japanese) and a guitarist in his own band, The Sinners. While still with Miyavi, maya and other support members also played live shows as LM.C. Later they were joined by Aiji of PIERROT.

After Maya quit Miyavi's band and Aiji's band PIERROT disbanded, LM.C made their major label debut in October 2006, releasing two singles, Trailers (Gold) and Trailers (Silver). As 2007 began, the group came out with a third single, OH MY JULIET., which was the 2nd ending theme for the Red Garden anime. On March 7, they released their first EP, GLITTER LOUD BOX. They released their fourth single, BOYS & GIRLS in June of 2007, featured as the opening theme for the anime Reborn!

Their fifth single, LIAR LIAR/Sentimental PIGgy Romance, saw an October 2007 release, while their sixth single, Bell the CAT, was released in December of the same year. In 2008, LM.C released JOHN, in the winter, and 88, another opening theme for the REBORN! anime, in the summer. LM.C then debuted in North America, performing at Anime Expo's "Battle of the Bands" on 3 July 2008, followed by a concert at the Crash Mansion in Los Angeles, California on 5 July. Also in July, they performed their first hall concert at C.C. Lemon Hall (Shibuya, Japan); tickets to the show were sold out within two minutes of its release. Closing on July, they were invited to perform at the "FORMOZ festival" in Taiwan as a main act for the second consecutive year.

In November, LM.C’s first album SUPER GLITTER LOUD BOX and the second album GIMMICAL☆IMPACT!! were simultaneously released worldwide. These two albums were also available worldwide on main music download stores on the same day, with possibly different release dates for other countries. On November 16th, the band embarked on their first world tour, the “LM.C TOUR ‘08-‘09”. This tour includes stops in South America, Europe, and Asia for a total of 34 shows in 12 countries.