一天，609号房东花(📒)花公(gōng )子Mum，看到一个小(🔱)伙在他的床(chuáng )上，从他们第一次见面就上床(🐮)那天后，神(shén )秘的事情不(bú )(🎏)断发(fā )(🌗)生。Mum总是(⚫)梦(🐿)见(🕔)一个(gè )神秘(🤷)的(🗄)事件(🎡)，半夜总(🙍)会被奇怪的梦突然(rán )惊醒。Mum试(shì )(🥞)图(tú )通过(guò )和女(🙁)人上床来忘记和(hé )年轻男子(🤷)的“情(qíng )感”。然而(🚣)，这甚至让他多想想他的梦中情(🌑)人。然(rán )后(hòu )(🥎)，他把(🗞)事件(📙)的点点滴(🏂)滴联系起来，提出(chū )了反(fǎn )向(xiàng )平行宇宙的理论。最后，他在(zài )现实生活中遇(yù )到了Dew。虽然(rán )他(🤖)们的第一次(cì )见(🤘)面(miàn )(🈁)是Dew的最后一(👊)天(🛎)，但也(yě )是(shì )他们两(liǎng )个互相帮助改变未来的开始！Oneday,astrangemanissleepingonMum’(🏴)sbed,aplayboyandtheownerofroom609.Theybothhavepassionatesexthefirsttimetheymeetandafterthat,mysteriousthingskeephapping.Mumalwaysdreamsofamysteriouseventandwakeupfrightenedinthemiddleofthenight.Mumtriestoforgetthe"feeling"withtheyoungmanbyhavingsexwithwomen.However,itevenmakeshimthinkofthemanofhisdreammore.Then,heconnectsthedotsoftheeventsandcomesupwiththetheoryofreverseparalleluniverse.Finally,hemeetsDewinreallife.ThoughtheirfirstmeetingisDew’slastday,butalsothebeginningthatbothofthemwillhelpeachothertochangethefuture!