一天，609号房(fáng )东花(📒)花公(gōng )子Mum，看(😘)到一个小伙在(zài )(🤢)他的床(🎺)上，从他们第(dì )一次见面就上床那天后，神秘(mì )的事(⏬)情不(bú )断(❣)发生。Mum总是(shì )梦见一个神秘的(🗄)事件，半夜总会(💆)被(bèi )奇怪的(de )(🛹)梦突然(rán )惊醒。Mum试图通(😚)过和(✖)女(nǚ )人(😻)上床来忘(🐶)记和年轻男(nán )子(zǐ )(🤷)的(🔊)“情(qíng )感(gǎn )”。然(rán )而，这甚至让他多想想他(tā )(🔢)的梦中(zhōng )情(qíng )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(zài )现实生活(huó )中遇到了(le )Dew。虽然他们(⚾)的第一次(🗳)见面是(shì )Dew的(de )最后一天，但也是(shì )他(😊)们两(liǎng )个(🏻)互相(🌹)帮助改变(biàn )未来(lái )的开(💅)始！Oneday,astrangemanissleepingonMum’(🏴)sbed,aplayboyandtheownerofroom609.Theybothhavepassionatesexthefirsttimetheymeetandafterthat,mysteriousthingskeephapping.Mumalwaysdreamsofamysteriouseventandwakeupfrightenedinthemiddleofthenight.Mumtriestoforgetthe"feeling"withtheyoungmanbyhavingsexwithwomen.However,itevenmakeshimthinkofthemanofhisdreammore.Then,heconnectsthedotsoftheeventsandcomesupwiththetheoryofreverseparalleluniverse.Finally,hemeetsDewinreallife.ThoughtheirfirstmeetingisDew’slastday,butalsothebeginningthatbothofthemwillhelpeachothertochangethefuture!