Ah! I'm Half Goddess, Half Demon?!
During their visit to the hot springs, Keiichi and the goddesses encounter Marller, who ends up socially drinking with Urd. But Marller manages to snatch a strand of Urd's hair, and uses it to make a clone to extract the demon side of Urd.
Aired 13/07/2006EP 15 - Ah! I'm Half Goddess, Half Demon?!

2006
Oh! My Goddess: Flights of Fancy
The song may say "thank heaven for little girls", but who is college student Keiichi Morisato supposed to thank when three honest to goodness Goddesses move in and take over his life? After all, according to most mythologies, relationships between mortals and immortals usually leads to mortifying complications, so we're already talking about an extremely mixed blessing!
(Source: Crunchyroll)