Mai liteul beibi

As a top detective, Jeong han has a promising future ahead of him. However, one day, his sister die in a accident and leave 5-month-old daughter to him. Now, his war against nursing starts. He happens to see his first love, Ye seul. She is a divored single mom living in neighborhood and gives him a hand with raising his niece. Can a former rough detective realize a true meaning of the happiness? (Prime Video)