It's a small world after all is a Hetalia Crack Fic written by troper, Bri Nara. Part of a series of crack fics named "Hetalia Crack Series". England tries an age reversing spell to get back to his glory days, but accidently turns himself and several others into little kids (everyone constantly refers to them as "Chibis.") The sequel has been named "It's Raining Women" as a Shout-Out to the song 'It's Raining Men'. More or less the same thing except with gender-bending, and pervy-ness. If you were looking for the trope, go here. Actual fic is here. It's Raining Women can be found here.