"Ai Ai Gasa" (アイアイ傘) is the third single by the Japanese duo Tegomass, released on June 18, 2008, by Jonny's Entertainment. It was used as the ending theme for the anime Neo Angelique ~Abyss~. It ranked first on the Oricon Weekly Singles Chart and charted for 13 weeks.^[1]

This article possibly contains original research. (February 2009)

"Ai Ai Gasa" was certified Gold by the RIAJ for shipment of 100,000 copies.^[2]

Literally ai ai gasa (相合傘) means to share an umbrella,^[3] but it could also be read as "Love-Love Umbrella", as the word for love (愛) is also pronounced ai. As such, sharing an umbrella as a couple in Japan is considered a romantic expression, and teenagers often draw an umbrella with their name and the name of their crush, the way one would in a heart. In Tegomass's video, the two are creating rain to make a young boy and girl walk under an umbrella together.

Limited edition track list:

1. "Ai ai gasa"
2. "Bokura no Uta"
3. "Moshi mo Boku ga Pochi Dattara…"

DVD track list:

1. "Ai ai gasa" (PV)
2. "Ai ai gasa" (Making)

Regular edition track list:

1. "Ai ai gasa"
2. "Bokura no Uta"
3. "Moshi mo Boku ga Pochi Dattara…"
4. "Boku no Cinderella"
5. "Ai ai gasa" (original karaoke)