Boombastic!

 is the major debut single (fourth overall) by Chu-Z.

Type-A CD

 * 1) Boombastic! (ボンバスティック!)
 * 2) Direct to U
 * 3) Boombastic! (Instrumental)
 * 4) Direct to U (Instrumental)

Type-B CD

 * 1) Boombastic!
 * 2) Direct to U
 * 3) Onegai Squall (おねがいスコール)

Type-C CD

 * 1) Boombastic!
 * 2) Direct to U
 * 3) iya iya iya

Type-A DVD

 * 1) Boombastic! (Music Video)
 * 2) Boombastic! (Making Clip)