This story is about Seohyun of SNSD/Girls Generation and Donghae of Super Junior. Seohyun and Donghae used to be best friends but ended up as strangers. Recently, Seohyun got a chance to meet Hyoyeon and talked for hours in a coffee shop. Seohyun and Hyoheon were talking about their summer vacation. Suddenly, Hyoheon opened up a topic and apparently, that topic was a dark secret of Donghae.