Koi suru Natsu!

Koi suru Natsu! is the second single by X21.

CD

 * 1) Koi suru Natsu! (恋する夏!)
 * 2) Gwiyomi Song (キヨミ・ソング)
 * 3) Koi suru Natsu! (恋する夏!) (Instrumental)
 * 4) Gwiyomi Song (キヨミ・ソング) (Instrumental)

DVD

 * 1) Koi suru Natsu! (MUSIC VIDEO)
 * 2) Gwiyomi Song (Dance Video)
 * 3) Koi suru Natsu! (MUSIC VIDEO Off-shot)

Featured Members

 * Wakayama Ayano
 * Tanaka Shuri
 * Kaminaguchi Honoka
 * Izumikawa Miho
 * Nagao Mami
 * Yamaki Koharu
 * Yoshimoto Miyu
 * Igashira Manami
 * Suenaga Mai
 * Komoriya Sakura
 * Shiratori Hasumi
 * Ozawa Nanaka