|Ah My Goddess|
|Japanese Title|| "Aa! Onee-sama wa Dare no Mono?"
|Release date||April 8, 2005|
|Ah My Goddess Season 1 Part 1|
|January 7, 2005 – April 8, 2005|
"Aa! Megami to Kōkan Nikki?"
"Ah! Teaching a Lesson Called Competition!"
"Ah! Who Does Big Sister Belong To?" "Aa! Onee-sama wa Dare no Mono?" (ああっお姉さまっは誰のモノっ?) Aired: April 8, 2005
Problems with Yggdrasil, focused on Belldandy, start to cause serious disruption on Earth. Belldandy's younger sister, Skuld, arrives to fix the system and take Belldandy back to heaven. The goddesses hunt down the bugs, while Skuld attempts to persuade Belldandy. As the bugs continue to disrupt Keiichi's life, Belldandy agrees to return to heaven after telling Keiichi that time travels differently there, and that one second in heaven could equal hundreds of years on Earth. Keiichi promises to wait for her return, no matter what. Although Skuld is pleased initially, she comes to realize the extent of Keiichi and Belldandy's dedication to one another. With Keiichi's help, she rebuilds her "bug stomper", and with the bugs finally eliminated, Skuld announces her intention to remain on Earth, to watch over the pair.