The fairies spend the entire month of August trying to swim in human-sized bodies of water and are thwarted each time. Sensai-san and Tama-chan help them find other fun things to do, and at the very end give them a fairy-size pool of water to have fun in.
The fairies caring for Hananan the flower is adorable, as is the part near the end when they decide to let her spread her seeds.
Les Yay: Except the fairies are all too naive to notice. Tense romantic/sexual situations have been instantly resolved by their realizing they haven't a ruddy clue what's actually going on anyway, then getting distracted by something else entirely.
Sweetness Aversion: Even the people who like it admit that it's literally condensed cuteness. It's been known to be used as a benchmark for loving cute things — if you can't stand it, you're a poser.
What Do You Mean, It's for Kids?: It's rated for all-ages and marketed as a children's series outside Japan, but has some radar-dodging moments, including an interrupted Seppuku fantasy and Hororo's "I'm your Valentine gift" bit.