Oyoung Ji is a survivor! Growing up as an orphan, life wasn’t easy for her. To make matters worse, she narrowly escaped a brutal attack at her orphanage. The only reason Oyoung’s life was spared was that she was saved by a mysterious man. Years later, she is barely scraping a living as a hospital custodian. So when she is offered a job as a live-in assistant for Logan Lee, one of the most prestigious (and handsome!) surgeons at the hospital, she gladly accepts! Little does she know… her new boss is her savior from the orphanage!

Sweet Psycho / My Sweet Psycho / Милый Псих / 달콤한 사이코
https://treemanga.com/manga/my-sweet-dark-hero/