kimigainakucha! / Hello, Happy World! / キミがいなくちゃっ! / ハロー、ハッピーワールド! / kimigainakucha! / Hello, Happy World!

Hello, Happy World! is Kokoro Tsurumaki (CAST: Miku Ito), Kaoru Seta (CAST: Azusa Tadokoro), Hagumi Kitazawa (CAST: Yuuri Yoshida), Kanon Matsubara (CAST: Moe Toyota), Michelle (CAST: Tomoyo Kurosawa)

M-01
Composer: Hitoshi Fujima (Elements Garden)
Arranger: Hitoshi Fujima (Elements Garden)
Lyricist: Asuka Oda (Elements Garden)
Guitar: Jun Anazawa
Bass: Ryuji Momoyama
Trumpet: Mitsuru Tanaka
Alto Sax: Ryoji Ihara
All Other Instruments & Programming: Hitoshi Fujima
Directed by Hitoshi Fujima, Yuta Kasai (Elements Garden)

M-02
Composer: Ryota Suemasu (Elements Garden)
Arranger: Ryota Suemasu (Elements Garden)
Lyricist: Asuka Oda (Elements Garden)
Guitar: Kyoichi Miyazaki
Bass: Ryuji Momoyama
All Other Instruments & Programming: Ryota Suemasu
Directed by Ryota Suemasu

Mixed by Eiichi Nishizawa
Recorded at ARIA Studio
Sound Produced by Elements Garden
Production Management: Asami Suita (ARIA entertainment), Kurumi Sakamoto (ARIA entertainment)


Producer: Shuji Yoshimura
Director: Tae Nakamura
A&R: Yumiko Nakane, Yi Wang

Promotion: Kyo Ito, Eri Handa, Yuya Kasasaku, Shunsaku Hirai, Nobuhiro Ogawa, Chie Nagasaku, Kanna Miyagawa, 島内美祐, Rina Suzuki
Production Management: Takeya Kinbara

Mastering Engineer: Takeo Kira (Mastering Studio TEMAS)

Jacket Designer: Yoshiko Tokutake (5SPICE DESIGN)
Illustration: Craft Egg

Executive Producer: Takaaki Kidani, Kazushi Miyakoda

Special Thanks: BanG Dream! Project, Craft Egg, ISSEN XEBEC, ESP Co.,Ltd., Roland Corporation, Pearl Musical Instrument Co., Kyoritsu Corporation Co., Ltd., Pioneer DJ, All BanG Dreamers