No.1 / Mugamuchuu

 is the major debut single (seventh overall) single released by ULTRAGIRL.

It was released on March 18, 2015.

Single Information

 * Catalog Number:
 * VICL-37027 (Regular Edition)
 * VICL-37028 (Limited Uru Edition)
 * VICL-37029 (Limited Tora Edition)

Regular Edition

 * 1) No.1
 * 2) Mugamuchuu (無我夢中; Selfish)
 * 3) No.1 (Instrumental)
 * 4) Mugamuchuu (Instrumental)

Limited Uru Edition

 * 1) No.1
 * 2) Mugamuchuu
 * 3) No.1 (Instrumental)
 * 4) Mugamuchuu (Instrumental)
 * 5) Tomoron Voice 1 (ともろん Voice 1)
 * 6) Fumichyun Voice 1 (ふみちゅん Voice 1)
 * 7) Serinyan Voice 1 (せりにゃん Voice 1)
 * 8) Noachin Voice 1 (のあちん Voice 1)
 * 9) Mii-cha Voice 1 (みーちゃん Voice 1)

Limited Tora Edition

 * 1) No.1
 * 2) Mugamuchuu
 * 3) No.1 (Instrumental)
 * 4) Mugamuchuu (Instrumental)
 * 5) Tomoron Voice 2
 * 6) Fumichyun Voice 2
 * 7) Serinyan Voice 2
 * 8) Noachin Voice 2
 * 9) Mii-cha Voice 2

Featured Members

 * Arai Fumika
 * Aso Tomoyo
 * Kawasaki Serina
 * Suzuki Noa
 * Hirose Miyuu