is the second single of the subgroup Petitmoni. It was released on July 26, 2000 and sold 484,160 copies. It went to number one on the Oricon Charts in Japan.
In 2002, an English-language cover ("Our Youth 1.2.3!") was recorded by Irene Cara for the album Cover Morning Musume Hello! Project!.
Track listing
Lyrics and composition by Tsunku; Arrangement by Maejima Yasuaki
Lyrics and composition by Tsunku; Arrangement by Konishi Takao "Seishun Jidai 1. 2. 3! (Instrumental)" "Baisekō Daiseikō! (Instrumental)"
Featured lineup Kei Yasuda Maki Goto Hitomi Yoshizawa
References
External links "Seishun Jidai 1. 2. 3!/Baisekō Daiseikō!" entry on the Hello! Project official website