Su-jeong, 19, has been living a hectic life, taking care of her deceased mother's belongings. She meets her first love, 'Black Flame Dragon', in a game she started by chance. However, her first love, which was full of excitement, ends up being the darkest part of her life... 16 years later, Su-jeong, who has become the team leader of Yongseong Department Store, meets the newly appointed head of the headquarters, Ju-yeon.