You're a bubbly and quirky teacher in your late 20s who comes home from vacation to find your boyfriend with a woman and leaves him immediately to look for somewhere else to live. After you answer an ad for a new roommate on Craigslist, you found yourself moving into a loft in Daejeon with three men around your own age: Seungmin, Jisung, and Felix. After you move in, Jeongin, a former roommate and Seungmin's childhood friend, replaces Felix, who leaves the apartment to live in his own. 