A holiday in the religion of Yaoism.
May 10 marks
the day of when Uke had been freed by Seme from the devil, Yuri, and where Uke and Seme had
sexual intercourse that had miraculously and illogically made them pregnant with a son, Yaoi, who would soon become an artist and draw the first ever yaoi picture. This holiday is known as Hangover.
On Hangover, you give candy (preferably chocolate) to your lover, whether they're a boy or a girl, and give them a warming hug. This is similar to
Valentine's Day, but in May, not February.