After his wife death,he become the quitest guy in the world.It is because he love his wife very much and she is the only reason why he live.But until one day,a teenage girl named Han Seri enter his life and become the source of light for him to smile again.Even thought their age is 5 years different,but nothing to do with it.Can Seri change Sehun life and brought him back to this world from his darkness life?