A commemorative day set to this date because of the pun with the word "niconico"! (No relationship with a certain video hosting website)
Niconico is a word used to describe a friendly smile. The pun goes as follows: nico → ni(2) co(→ go, 5).You thought you'd easily get to see my smile because it's Smile Day, right?Well too bad! I'm not such an easy girl!Instead of that, I'll get Ghost-Half to smile!Eyebrows
