Y/N Cassano, Who Used To Be A Nerd, Had A Crush On Her Senior And Bully Kim Seokjin. She Bravely Proposed To Him In front Of The Whole College But He Rejected Her And Insulted Her. Y/N Left The College And Went To Italy. After A Few Years, She Returned Back To Korea As A Successful Lawyer With A Stunning Transformation. She Had A Interview With A CEO To Fight The Case For His Company. The CEO Of Kim Enterprises Who Turns Out To Be Kim Seokjin. Y/N, Being Professional, Works In His Office Related To The Case Without Realizing That Seokjin Has Become Madly Obsessed With Her. He Wants Y/N To Make His Forever. He Wants To Love Her Till His Last Breath. . . . . . . . . Y/N: Remember What You Told Me In The Past, That If I Was The Only Girl Left In This World For You To Get Married You Would Rather Die. Those Words Have Left A Deep Scar On My Heart. She Said While Tears Streaming Down Her Doe Eyes. Seokjin: That Was Past Love, I'm Telling I Have Changed Now And I'll Never Leave You Because You Are Mine Now. I Have Marked You As Mine . He Said While Wiping Her Tears With His Thumb.