一天，609号房(fáng )东(dōng )花花(🏽)公(gōng )子Mum，看(kàn )到一个小(xiǎo )伙在他的床上，从他(tā )们(🥈)第(🐉)一次见面就上床那天后(hòu )，神秘的事情不断发生。Mum总是梦见一个(👑)神秘的(de )事件，半(🕯)夜总会被奇怪的(🛹)梦突然(rán )惊醒(xǐng )。Mum试图通过和女人(rén )上(shàng )床(chuáng )(🖍)来忘记和年轻(qīng )(😱)男子(🤷)的“情感”。然而，这(🥁)甚至让(ràng )他多想想(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(yǔ )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(cì )见(🤘)面是Dew的最后一天，但(dàn )也是(shì )(🦇)他们(men )两个互相帮(bāng )助(🐨)改变(biàn )(🥋)未来的开(kāi )始！Oneday,astrangemanissleepingonMum’sbed,aplayboyandtheownerofroom609.Theybothhavepassionatesexthefirsttimetheymeetandafterthat,mysteriousthingskeephapping.Mumalwaysdreamsofamysteriouseventandwakeupfrightenedinthemiddleofthenight.Mumtriestoforgetthe"feeling"withtheyoungmanbyhavingsexwithwomen.However,itevenmakeshimthinkofthemanofhisdreammore.Then,heconnectsthedotsoftheeventsandcomesupwiththetheoryofreverseparalleluniverse.Finally,hemeetsDewinreallife.ThoughtheirfirstmeetingisDew’slastday,butalsothebeginningthatbothofthemwillhelpeachothertochangethefuture!