Ah! I Want to Fill the World with Happiness!
Keiichi and the gang are invited to Sayoko's big Christmas gala. Sayoko hopes to embarrass Belldandy with a bunch of sideshows and a drinking contest but Belldandy is unaffected by it. But when she tries a can of Coke for the first time, Belldandy's demeanor changes, and wherever she spreads happiness, a different sideshow happens on Keiichi!
Aired 27/04/2006EP 4 - Ah! I Want to Fill the World with Happiness!

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)