For almost 3 years, Han Seul dated Park Chanyeol.For almost 3 years, they shared an almost perfect relationship.For almost 3 years, their lives revolved around each other.For almost 3 years, they loved each other.  But in a snap of a finger, Han Seul broke up with him.No explanations.No goodbyes. Just 10 letters that are sent to Chanyeol for 10 months, every 26th.. explaining him10 reasons why she broke up with him.