Beautiful X

 is the second album by X21.

CD

 * 1) Beautiful X
 * 2) Magical☆Kiss (マジカル☆キス)
 * 3) Zettai Heroine (絶対ヒロイン)
 * 4) Natsu dayo!! (夏だよ!!)
 * 5) Colorful Shimasho (カラフルしましょ)
 * 6) Doko kara Nashi? (どこからナシ?)
 * 7) every time, every where
 * 8) Yakusoku no Oka (約束の丘)
 * 9) Kagami no Naka no Parallel Girl (鏡の中のパラレルガール)
 * 10) YOU-kI no Parade (YOU-kIのパレード)
 * 11) Who is X!? (Long Version)
 * 12) Egao no Prologue (笑顔のプロローグ)
 * 13) YOU-kI no Parade (YOU-kIのパレード) (DELUXE EDITION)

Blu-ray

 * 1) Beautiful X (MUSIC VIDEO)
 * 2) YOU-kI no Parade (MUSIC VIDEO)
 * 3) Magical☆Kiss (MUSIC VIDEO)
 * 4) Yakusoku no Oka (MUSIC VIDEO)
 * 5) Natsu dayo!! (MUSIC VIDEO)
 * 6) Kagami no Naka no Parallel Girl (MUSIC VIDEO)
 * 7) Beautiful X (MUSIC VIDEO Off-shot)
 * 8) 【2015.9.26 2nd PREMIUM LIVE at Zepp DiverCity TOKYO】 BEST SELECTION
 * 9) Eien×Setsuna
 * 10) Koi suru Natsu!
 * 11) X Gift
 * 12) Tsurakunai yo
 * 13) Material Girl
 * 14) Anata no Tonari
 * 15) Sekigae Wink
 * 16) Shinpai Everyday
 * 17) Wakuwaku☆WALKIN’
 * 18) Ashita e no Sotsugyou
 * 19) Happy Appli
 * 20) YOU-kI no Parade
 * 21) Best Friend
 * 22) Chime Nattara...

VR

 * 1) Beautiful X MUSIC VIDEO VR version
 * 2) Yoshimoto Miyu VR PR Video
 * 3) Ozawa Nanaka VR PR Video
 * 4) Suenaga Mai VR PR Video
 * 5) Izumikawa Miho VR PR Video
 * 6) Nagao Mami VR PR Video
 * 7) Komoriya Sakura VR PR Video
 * 8) Igashira Manami VR PR Video
 * 9) Yamaki Koharu VR PR Video
 * 10) Shiratori Hasumi VR PR Video
 * 11) Tanaka Juri VR PR Video
 * 12) Kaminaguchi Honoka VR PR Video
 * 13) Matsuda Rina VR PR Video

Featured Members

 * Yoshimoto Miyu
 * Ozawa Nanaka
 * Suenaga Mai
 * Izumikawa Miho
 * Nagao Mami
 * Komoriya Sakura
 * Igashira Manami
 * Yamaki Koharu
 * Shiratori Hasumi
 * Tanaka Juri
 * Kaminaguchi Honoka
 * Matsuda Rina