”No-pan Sweat Night” is such a monster party in Japanese gay scene. The total number of visitors is more than 25,000! This party’s dress code is very original and ingenious: Sweat Pants Without Underwear（”NO-pan” means wearing no underwear）. This style gained tremendous popularity in Japan, because it’s erotic although they don’t have to be naked.
Every time, there are a lot of young gay boys on the floor, suddenly “Black out time” is start, and … Let’s have fun!