Umbrella formed in March 2010 around the core members of Yui on guitar & vocals and Hal on bass. They held their first live performance in June of the same year. Their first mini-album, [Amayadori], was released on July 1, 2011. In about three months, around October 17, the 500 copies of the album's first press sold out and 300 additional copies were quickly printed. From October 14-19 they participated in the Road to V-Rock Festival event at HEAVEN'S ROCK VJ-3 and won, giving them the opportunity to perform in V-Rock Festival '11 on October 23. They performed two songs on the Saitama Super Arena stage. The guitarist Syu also joined the band in October 2011. On December 1 of that year, they released their first single, [Samidare], through Starwave Records. In April 2012 they kicked off a nationwide tour, ending with the Kanto final on June 6 at Takadanobaba AREA, and on June 23 they claimed great success in their first one-man performance at Shinsaibashi club ALIVE!. They released their second mini-album, [Monochrome], in fall 2012.