Monsta X made their debut with the release of their first extended play, Trespass on May 14, 2015. The title song of the same name is produced by Rhymer and described as a "strong and edgy track that reflects Monsta X’s unique character".
Trespass includes seven different tracks, rapper Jooheon was the most involved member in the production of the album and composed several songs, including "One Love," "Steal Your Heart," and "Blue Moon".
Monsta X’s other rapper, I.M was also involved in the rap making of several songs. Kihyun and Wonho also contributed song lyrics for the album.
Track list:
01. Trespass (무다침 입)
02. No Exit (줄구는없어)
03. One Love
04. Honestly (솔직히말할가)
05. Steal Your Heart (훔쳐)
06. Blue Moon
07. Interstellar (인터스텔라)
