Both of dramas have the same plot about revenge to their family in the past and using somebody as a victim to hurt their family but it's turn out that they fall in love with each other in the end

This story is about revenge to part of their family and find the right person who support and love them unconditionally

If you like story line about lovers who growing and make a business together until they're success, Start up and FL have the same story about that, and also both of them focusing on programming computer, and not forget to mention Jipyeong and qin the have the same vibe Second lead as childhood friend and Rich man meanwhile Zhang Han and do San from poor family but have big passion to make the FEMALE LEAD Happy ?

It has similarity because the guy like his own sister even though they're not blood related, they like arguing about everything, and both the lead male mostly bullied the girl to get her attention