Sato Yui is a dispatched contract worker at Amagi Pharmaceutical Company. Her pet has died and she feels deep sorrow over its death. One day, she drinks alone at a bar and shouts, with tears running down her face, "Develop medicine to bring back someone to life!" At that time, a man walks towards her. He makes a spiteful remark that there is no such medicine that can bring someone back to life. He also tells her to stop barking and to go home. Yui feels anger within herself and she trips him. She then leaves the bar. Yui is unaware that the man she tripped is Amagi Kyoichi and he is the CEO of Amagi Pharmaceutical Company.
The next day, Yui hears at work that the CEO is looking for her. When she gets to his office, she realizes the man she tripped in the bar is the CEO. She thinks that she might get fired, but he suddenly tells her to "Please treat me as a slave."

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Nestled deep in the heart of Seoul’s thriving downtown sits a curious hotel, the like of which no one has ever seen before. Old beyond measure, the building has stood for millennia, an ever-present testament to the fact that things are not always what they seem. Running this hotel is Jang Man Wol, a greedy, suspicious soul who has spent the past thousand years acting as the establishment’s CEO.

Bound to the hotel by a deity who keeps her there to save her from going berserk and self-destruction with rage, hatred and thirst for revenge. Her only hope of escape is if she can let go of her resentment and hatred and find love. Trapped in her resentment for a betrayal, Man Wol is doomed to spend all of eternity running this odd establishment, catering to the needs of the most peculiar clientele.

Things take an interesting turn when Goo Chan Sung shows up. Once the youngest assistant manager ever to work at a multinational hotel corporation, Chan Sung finds himself forced to manage the Hotel del Luna because of a deal his father made with Man Wol years ago. Excellent with managing money, he starts to put Jang's excessive spending and disastrous financial situation in order; that may be exactly what this odd establishment and its cursed CEO needs.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Gyun Woo is a college student, more interested in picking up girls, drinking with his buddies and avoiding his nagging mother whenever possible. While riding the subway, a drunken girl then changes his fate forever. She's nearly unconscious on the train and vomits on an older guy. She then leans over to Gyun Woo and everybody assumes she is his girlfriend! Gyun Woo soon finds himself in a relationship he didn't ask for, but soon unable to forget this sassy girl.

Cha Moo Hyuk was adopted by an Australian family but was abused and left homeless at an early age. One day, he comes across Song Eun Chae, the coordinator for Choi Yune, a famous singer in Korea whom she is secretly in love with. Her fateful encounter with Moo Hyuk ends up affecting not only her life but that of her precious Yune as well.

Because of an accident involving his ex-girlfriend, Moo Hyuk is left with 3 months to live. This leads him to head back to Korea in search of his biological mother. The discoveries he makes change his heart from longing to revenge. Even with all this darkness surrounding him, he finds an unexpected source of happiness with someone he did not expect to love.