Hmmmmm.... What to say about the preview:
Ummmm... Momo's high notes are lovely (Momo's vocals seem to be at their best here! XD), and Airi & Miya's harmonies are also lovely!! <3333
The PV looks nice, it suits the song very well, and the outfits look nice too (The girls look like angels in those white dresses! xD)! The song reminds me of Take It Easy to some extent... Both were summer songs, and both were sort of "calm" and "relaxing"... Although in my opinion, I think Natsu Dakara definitely pwns Take It Easy (I find the melody to be catchier).