《MAN X MAN》是韩国JTBC电视台于2017年4月21日首播的金土连续剧，由李昌民执导，金沅奭编剧，朴海镇、朴成雄、金玟廷、延政勋等主演。该剧以特殊警卫要员金蔎雨与大明星吕云光的兄弟情作为焦点展开，讲述长时间以明星身份生活的演员和其拥有特殊调查权、负责警卫工作的保镖之间所发生的故事。许阁为《Man To Man》献唱第三波OST《The Reasons 》。《The Reasons》是一首忧伤钢琴旋律与许阁感性歌声完美结合的抒情曲，由Lovecitty团队担当制作，歌词讲述「心爱的人便是自己活下去的理由」，在《Man To Man》第三集，吕云光回想起过去听到宋美恩结婚消息时的片段曾经出现过，令人印象深刻。JTBC Gilt Drama `One Man` OST Part. 3- Hagak's Why You Are'Reason of You' is a sophisticated ballad that blends warm and soft orchestral sounds with a gentle piano melody. It is the most gentle and deeply melodic song of the One Man OST.Also, through the emotional voice of Gyu-gang, the lyrics such as the poetry of the electrolytic will give a different impression to the viewers.'You Really Really' has recently perfected the production of 'Love City,' a sensational composition duo 'Love City' that has received much attention as a drama and movie OST.[Credit]1. Reason for youProduced by Love CityLyrics by SDJEDComposed by Love CityArranged by SeongminVocal by HeukiStrings by Jam StringRecorded by Jung Min at Studio MMixed by Jung Min at Studio MMastered by Dae Jung Sook & Park Jun (SoundMAX)