Moonlight Of The Blood Night

what happens when three poor boy from Busan gets kidnapped by three richest Mafia's in exchange of their family dept and gets caged by those Mafia's ? what happens when Kim taehyung his elder brother Kim seokjin and their cousin park jimin gets kidnapped by jeon jungkook aka Jk, Kim namjoon aka rm, min yoongi aka suga the three richest mafia brothers (cousins) ? will they escape ? or will they di3 ? or will they end up falling in love with them ? what happens when those three Mafia's are not actual humans ? if they are some sort of vampire ? alpha ? to know more, read the story....no spoilers.... thank you