一天，609号房东花花公子Mum，看到一个小伙在他的(de )床上，从(cóng )(🎹)他(🆖)们(🥈)第(🐉)一次见面就(jiù )上床那天后，神秘的事情不断发生。Mum总(zǒng )是(shì )梦见一个神秘的事件，半夜总会被奇怪的(de )梦突然惊醒。Mum试(shì )图(🗑)通过(🍮)和(hé )女人上床(chuáng )来忘记和年轻(qīng )(😱)男(nán )子(🤷)的(🔊)“情感”。然而，这甚至让他(tā )多想想他(🔢)的梦中情人(rén )。然后(hòu )，他把事件(📙)的点点滴滴联系起来，提出(🙀)了(le )反向平行宇宙的理论。最后，他(🤲)在现实(😍)生活中(zhōng )遇到了Dew。虽然他们的第一次(🗳)见面是Dew的(🏉)最后一(yī )天，但也是他们两个(gè )互相帮(bāng )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!