Uhmm what did I just read ╥﹏╥ I think, like, it's nice sure, but where did that ran...

Uhmm what did I just read ╥﹏╥ I think, like, it's nice sure, but where did that random cosplay event come from????? And how was chanwook just randomly there saving the day?????? This was soo confusing, especially since it doesn't have a good translation. ╮(￣▽￣)╭