I had to read that headline a couple of times, thinking that I was about to see the theme song for Nendoroid Generations. It turns out the song "Anata n FIT" is just for Nendoroids themselves! It brings me back to the days of the early 90s when all toys had catchy jingles. Or maybe I'm just retro-goggling.
The theme song comes from ClariS, known for their themes for Ore no Imouto and Madoka Magica. Not being a connoisseur of anime OPs, you'll have to let me know how it stacks up.
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