一天，609号(hào )房(🥇)东花(huā )花(huā )公子Mum，看到一个(🛍)小(xiǎo )伙在他的(de )床上，从他(🆖)们第(dì )一次见面就上(shàng )床那天后(😧)，神秘(mì )的事(⏬)情(qíng )(🎲)不断发生(🏇)。Mum总是梦见一个神秘的(🗄)事件，半夜总(🙍)会被奇怪(guài )的(de )(🛹)梦(mèng )突(🏐)然(rán )惊(🐖)醒。Mum试(🥞)图通过(guò )和女人上床来忘记和年(nián )(🤯)轻(qīng )男子的(🔊)“情(⏺)感”。然而，这甚至让他(tā )多想(xiǎng )想(xiǎng )他的梦中情人。然(㊗)后，他把(🗞)事件的点点滴滴联系起来，提(👓)出(🙀)了反向平行宇宙的理论。最后(🔔)，他在现实生活中遇到了Dew。虽(🚴)然他们的第一(yī )次见面是Dew的最后一(yī )天，但(🚗)也是(shì )(🦇)他们两(liǎng )个(gè )互(🐛)相帮助改变(biàn )未(wèi )来的开(💅)始(🌼)！Oneday,astrangemanissleepingonMum’sbed,aplayboyandtheownerofroom609.Theybothhavepassionatesexthefirsttimetheymeetandafterthat,mysteriousthingskeephapping.Mumalwaysdreamsofamysteriouseventandwakeupfrightenedinthemiddleofthenight.Mumtriestoforgetthe"feeling"withtheyoungmanbyhavingsexwithwomen.However,itevenmakeshimthinkofthemanofhisdreammore.Then,heconnectsthedotsoftheeventsandcomesupwiththetheoryofreverseparalleluniverse.Finally,hemeetsDewinreallife.ThoughtheirfirstmeetingisDew’slastday,butalsothebeginningthatbothofthemwillhelpeachothertochangethefuture!