"Dream of Hope and Great Leap" X1, 9th, preorder for debut album 'Emergency: Quantum Leap' begins.

New boy bands X1 (: Han Seung-woo, Cho Seung-Yeon, Kim Woo-suk, Kim Yo-han, Lee Han-Gil, Cha Jun-ho, Son Dong-Pyo, Kang Min-hee, Lee Eun-sang, Song Hyung-Joon, and Nam Do-Hyun) have started their debut in earnest.

A short video titled "[X"] M/V Shooting D-1" was posted on the official X1 SNS and fan cafe on Tuesday.

The released video was taken on Thursday, showing the members of the comfortable-clad X1 practicing their choreography the day before the music video shoot.

In addition, preorders for X1's first mini-album "Emergency: QUANTUM LEAP" is scheduled to begin at 2 p.m. on the online record site on Tuesday.

The album consists of an "emergency" version with 11 X1 members expressing their hopes of flying together, and a "QUANTUM LEAP" version featuring X1's determination to take a giant leap forward.

Each version includes a photo book with differing concepts and consists of a mini photo stand, postcard, and bookmark, as well as a special AR photo card and poster, a limited number of initial components.

Meanwhile, X1 will host "Premier Show-Con," a combination of a showcase and a concert, at 8 p.m. on April 27 at Gocheok Sky Dome in Seoul, and make its official debut.