Love women man who cheated to get revenge for the lost memories of that conflict, while another woman to love, whereas an authentic melodrama.
Smart and promising medical student Kang Ma-ru (Song Joong-ki) has been in love all his life with his slightly older neighbor Han Jae-hee (Park Si-yeon), a television reporter.
He is an adoring boyfriend and she always considered Ma-ru her home.
But when her situation takes a turn for the worse and Jae-hee becomes desperate to escape poverty, she meets a man who changes everything?a rich CEO who introduces her to a life of comfort.
So she turns her back on Ma-ru, choosing money over love.
The brutal betrayal leaves Ma-ru fractured?not just angry, but a completely changed man.
A few years later, Ma-ru is now 30 years old and works as a bartender and gigolo, no longer a "nice guy."
He then meets Seo Eun-gi (Moon Chae-won), a young chaebol heiress who's being groomed to take over her father's conglomerate.
Eun-gi is cold and calculating, business-savvy, and raised by her father to never show emotion to anyone.
But Ma-ru intrigues her, and she becomes curious until she cant stop thinking about him.
Ma-ru decides to take advantage of her as a pawn in his plans for revenge, and Eun-gi falls in love with him, not knowing that hes using her to get back at his ex Jae-hee, who happens to be Eun-gi's young, gold-digging stepmother.
Just when Ma-ru is beginning to genuinely care for Eun-gi, she finds out the truth and they break up.
But a car accident causes Eun-gi to lose her memory, and she enters Ma-ru's life again.