Do you always call a series by it's official name? Often, when I browse san-x.jp or other websites for new series coming out, I can't actually read the name and have no clue what they are officially called by san-x. And because the names are sometimes just too long, my friend Abi and I started giving nicknames to the plushie series!
May I introduce to you : "Pink hat" a store only edition that came out this year (2013) and goes along with the happy natural Time series. I think the reason for this nickname is pretty obvious :)