一(yī )天，609号房东(dōng )花花公子Mum，看(😘)到一(yī )个小伙(huǒ )在(zài )他的(de )床上，从他们第一次(cì )见面(miàn )就上床那(🥩)天(tiān )后(hòu )(😧)，神秘的事情(qíng )不(🎏)断发生。Mum总是梦见(jiàn )一(yī )个神秘(🤷)的事件，半夜总会被(✳)奇怪的(🛹)梦突(🏐)然惊醒(🕌)。Mum试图(🗑)通过和女人(rén )上床(🖍)来忘(🐶)记和年轻(qīng )男(🐖)子的“情(qíng )感(🚢)”。然而(ér )，这(🥁)甚至(zhì )(📯)让(🚨)他(🛑)多想(xiǎng )想他的梦中情人。然(rán )(㊗)后，他把事件的点(✋)点(🐑)滴滴联系起来，提(tí )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(suī )然(rán )他(🤖)们(men )的(🕯)第一(yī )(👣)次见面是Dew的最(zuì )后(hòu )一天，但也是他们(men )两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!