Yoongi, or Suga, as his close friends and family call him, keeps his job to support him and his sister, Min Lang. Their parents left them both to be adopted when they were little babies, leaving them nothing but a roof over their head. Suga's job is very tiresome and stressful, but he needs it regardless of what he thinks. A year after working at his restaurant job, his life completely changes when he meets the new worker, So-Kyong. And then he finds out that he has to be her mentor until she understands everything that he does, since they both have the same job. While this is all happening, Joy, a coworker that secretly has a crush on Suga, stirs up trouble with the new worker...welcome to the whole journey of Suga and So-Kyong's secret love?