you know they have those in Mexico for a long time now, they are like bayblades but wooden and you have to spin them by carefully wrapping them in a string and thowing them in the right angle, fighting with those was one of the best things in my childhood, if you were skillfull enogh you could actually beat someone so hard that they had to put their ''trompo'' in a circle and watch as you tried to break it in half by thouwing your with its steel end to the center of theirs, it was hard but rewarding and a little evil.
The reason everyone talks about hanako and chocolate is because of this comic. I think this comic came out before the game and people were scared that since it was made by 4chan the sex would be disgusting.