The One and Only (2021)

Pyo In Sook, abandoned by her parents and raised by her grandmother, works at a public bathhouse, living a tough and emotionless life. After being diagnosed with a terminal illness, she faces her mortality without reaction. At hospice, she meets two women, social media influencer Seong Mi Do and lonely housewife Kang Se Yeon, and a contract killer, Min Woo Cheon. Each woman plans to take revenge on someone who wronged them, but as they bond, their anger fades. In Sook’s developing feelings for Woo Cheon make her reconsider her plans. (Source: MyDramaList)