After finishing her college's entrance exam, Min Ji has 5 months of free time. She applied for a part time job in a H&M store. There, she met Jung Jaehyun; the co-worker she felt in love at the first sight, Kang Daniel; the shy and awkward co-worker, Kim Do Young and Go Junhoe; the bullies, Kim Jennie and Nakamoto Yuta; the cold seniors, Kang Seulgi and Johnny Seo; the kind seniors, Wong Yukhei; the clumsy foreign co-worker, Kim Jungwoo; the gay co-worker, Bobby Kim; the flirty co-worker and Lee Haechan; the playful and carefree co-worker who is in the same age as her.