* AudienceAlienatingPremise: Just read the concept.
* SoBadItsGood: Yes, it's shamelessly laden with fanservice. Yes, the fact that the main character is an underage grade-schooler that transforms into an extraordinarily busty flower spirit is ridiculous, as is the fact that an old man gave her those powers. Yes, these factors are also pretty squicky when you get down to it. But the concept is so goofy and executed in a way that demonstrates that it doesn't take itself seriously at all that it's hard not to laugh and enjoy just how ridiculous it all is.
* {{Squick}}: Natsumi's dance, to trigger her transformation sequence, is disturbingly sexual considering her age. Ditto for Nami's dance, what with the innuendo surrounding the water and all.