Otoko Series

The Otoko Series ( 【男】シリーズ Otoko Shirīzu) is a trilogy of Drama CDs released for Tengen Toppa Gurren Lagann. It presents a world where the cast of Tengen Toppa Gurren Lagann lives in modern-day Japan, most of them either in attendance of or staffing the Dai-Gurren Academy, dealing with the impending forcible take-over of Japan by America's Teppelin Foundation.

The three parts consist of:
 * Otoko Ippiki Gurren Lagann - released with the Japanese Tengen Toppa Gurren Lagann Volume 5 DVD.
 * Otoko Do-ahou! Gurren Lagann - released with the Limited Edition DVD release of Gurren Lagann The Movie: Childhood's End in Japan.
 * Otoko-gumi dayo! Gurren Lagann - released with the Limited Edition DVD release of Gurren Lagann The Movie: The Lights in the Sky are Stars in Japan.