Jeongwon, who is traumatized by four-wheeled vehicles because of a car accident, got a ride from Kim Jisoo's bike by chance during the new semester. She falls in love with Jisoo at the first sight together and gains an unknown sense of freedom. Hwayeon, one of Jeongwon’s close friends, is aware of Jeongwon's feelings and panics. The more she tries to separate them from each other, the more Jeongwon wants to get closer to Jisoo... However, Jisoo avoids Jeongwon, and Hwayeon interferes with Jeongwon's growing feelings because of her unpredictable attitude...