Yang Eun-bi (Lee Chung-ah), a university student in her mid-20s, prepares for her civil service exam with the dream of being a high school teacher. She accidentally encounters Cha Chi-soo (Jung Il-woo), the arrogant heir to the biggest food conglomerate in South Korea. Eun-bi is initially attracted to Chi-soo until she finds out that he is only a high school senior, causing her to dislike him. On the other hand, Chi-soo becomes fascinated with her because she is outspoken and athletic, unlike the other women he knows. However, Chi-soo does not interpret his fascination as romantic interest, as he is out of her league and he usually only loves self-interested girls like Yoon So-yi, a ballet student now dating Chi-soo's rebellious classmate, Kim Ba-wool. Eun-bi resists her attraction in turn, believing Chi-soo is only toying with her. Eun-bi is looking for a more serious relationship, after being dumped by a cheating ex-boyfriend while waiting for him to complete his mandatory military service. She frequently turns to her dating-savvy roommate/ex-high school volleyball teammate Kang Dong-joo for advice. After Eun-bi's father (Jung In-gi) passes away, she is surprised to find out that he has left his ramen restaurant to Choi Kang-hyuk (Lee Ki-woo), whom he had helped when the latter was a troubled youngster, instead of to her. It is soon revealed that Eun-bi's father did this in the hope that Kang-hyuk and Eun-bi would marry. Eun-bi, after losing her student-teaching assignment because of her conflicts with Chi-soo, starts to work at the ramen shop along with homeless fellow students, Kim Ba-wool (Park Min-woo) and Woo Hyun-woo (Cho Yoon-woo). Chi-soo also wants to work at the restaurant to get over his growing obsession with Eun-bi. Knowing that he and Chi-soo actually share the same mother, Kang-hyuk allows him to join the shop out of concern for his cold half-brother. Kang-hyuk quickly develops feelings for Eun-bi, but she finds herself more attracted to the passionate Chi-soo. After many misunderstandings, Chi-soo realizes that his obsession with Eun-bi is actually attraction, and competes for Eun-bi's affections with Kang-hyuk. However, Chi-soo's father (Joo Hyun) disapproves. Chi-soo's (and Kang-hyuk's) mother had also been an average (not rich) woman, and Chi-soo's father believes that difference was one of the reasons for their separation several years ago. The company of Chi-soo's father is planning to redevelop the area in which the ramen shop is located, so he tries to use the possible destruction of the ramen shop as leverage to keep Eun-bi and Chi-soo apart. Chi-soo has become attached to the ramen shop, and afraid of being disowned, he initially chooses to stay with his father. At the end, Chi-soo visits Eun-bi after he has completed his two-year service in the South Korean Army without contacting her.
