Trigger Warning: Big age gap relationship

What else should I say other than portrayal of the age gap relationship and prostitution at young age, other than that rest are all good (I think?). Though I wished the main female character to be older like between 20 to 25, the plot and the story is written purposely like that because it’s realistic, and could teach a lesson to youngsters. If you have weak heart and couldn’t bear watching problematic actions then this series is not for you.