I was buying some DLC for a Gundam game and I had 300 yen left (which is practically worthless can't get much with it) so I got it as it was on the main splash page.
Basically, it's a girl in a kitchen with a bowl of rice and the game is to dump a whole jar of mayonnaise on your bowl of rice by swirling the left analog stick in one continuous motion, making sure you don't stop or make studdered movements or else you will fail miserably and the mayo jar will get stuck and she'll make the "oh noes" face with the depressing crashing piano music.
If you win however, there'll be huge swirlypoo mountain of mayonnaise on her rice and she'll be all happy happy joy joy with the red and white Nippon stripes in the background and lively music. There's like 5 different flavored (colored) mayonnaise jars. (So basically 5 stages) I think it's a preview for some upcoming game..