Aa!

Aa! (あぁ!) was the second Hello! Project unit that Hello! Project Kids members officially joined. It was lead by Morning Musume member Tanaka Reina, and featured Hello! Project Kids members Natsuyaki Miyabi and Suzuki Airi. Tsunku chose this name because of all the feelings it refers to, presumably being in love.

First Generation

 * Tanaka Reina (田中れいな) (L)
 * Natsuyaki Miyabi (夏焼雅)
 * Suzuki Airi (鈴木愛理)

Second Generation

 * Natsuyaki Miyabi (夏焼雅) (L)
 * Suzuki Airi (鈴木愛理)
 * Saho Akari (佐保明梨) (Left in April 2011)

2003
Aa! released their first, and only, single "FIRST KISS", on the 29th October 2003. This song appears on the compilation album "Petit Best 4".

On October 31, 2003, Aa! appeared on the popular show Music Station.

2004-2007
In 2004, Natsuyaki Miyabi joined Berryz Koubou, while Suzuki Airi became part of the group ℃-ute in 2005.

In 2006, Tanaka and Suzuki teamed with another Hello! Project Kid, Murakami Megumi, for the song "Suki ni Naccha Ikenai Hito", one of the coupling tracks on the H.P. All Stars' "ALL FOR ONE & ONE FOR ALL!" single. The track is credited to the individual participants, but many fans have informally referred to this grouping as "Aa! Version 2."

In 2007, Natsuyaki Miyabi and Suzuki Airi joined Buono!.

2009
In 2009, The group returned from hiatus and took part in the Hello! Project album Chanpuru 1 ~Happy Marriage Song Cover Shuu~, with a lineup of Natsuyaki Miyabi, Suzuki Airi and Saho Akari. Tanaka Reina is instead featured as a member of High-King, who are also on the album. They were later featured in the compilation album Petit Best 10, with "Yume to Genjitsu".

2011
Aa! participated in the Hello! Project 2011 Winter ~Kangei Shinsen Matsuri~ A gana Live concert, covering DON'T STOP Ren'aichuu and Shining Itoshiki Anata.

In April 2011, Saho Akari graduated from Hello! Project to join Up Up Girls (Kari).

Singles

 * [2003.10.29] FIRST KISS

Compilations / Other

 * [2003.12.17] Petit Best 4 (#8 FIRST KISS)
 * [2008.12.10] Hello! Project Special Unit Mega Best (#6 FIRST KISS)
 * [2009.07.15] Chanpuru 1 ~Happy Marriage Song Cover Shuu~ (#3 YES-YES-YES)
 * [2009.12.02] Petit Best 10 (#8 Yume to Genjitsu)

Trivia

 * At the time of it's formation, Aa! had the lowest average age of all Hello! Project units, that being eleven years old.
 * During her time in this unit, Suzuki Airi was only nine years old, the youngest Hello! Project member to sing a major part in a unit.