Exclusively from Ikebukuro's Sunshine City's indoor theme-park, Namjatown: a 2011 P4 Animation event card.  Nanako here is already researching future slime supplements to try out on her new big bro.  He'll never notice what's in his breakfast.  :p 
Chunky Viscous Potage Milk! mm mmmmm and it's for your healths.

~This item qualifies for Lettermail super affordable shipping~!