Similar premise with roles reversed. I think Whos The One is more suitable for guys

Similar Japanese woman and Korean man love story. Marriage War is a special and very lighthearted

Love is not Blind is more thought provoking and also about exes. LINB makes you reflect on relationships and life in general and was a very successful film

Both have a similar easter egg. I can't tell because of spoilers haha

This was the original that Operation Proposal is based off. Best friends falling in love but getting fooooorever to act on their feelings

Similar plot about family not related by blood. I found Ugly Alert more touching though.