Autumn's Concerto (2009)

Ren Guang Xi, a cocky law student, seems to lead the perfect life. He's the sole successor to a huge and famous business and is a talented ice hockey player. But in reality, his lonely life lacks joy, laughter and motivation. That is until he meets Liang Mu Cheng, the new bento seller at his school canteen. A harmless bet brings the two together and Guang Xi slowly changes as Mu Cheng teaches him how to give and love. Tragedy strikes when Guang Xi suddenly has to go through a major brain surgery which causes him to lose his memory.

-Rich playboy falls for a poor woman, who is not that great
-Both Male leads at start try to play with female lead feelings but soon fall for them
-Both male leads were crazy in love with the female lead, but in P.S. Man she rejects him there is no memory loss
-Both male leads are hurt by the female leads keeping secrets from them
-Both Male Leads are exponentially aggressive for some sane reasons, Autumn's Concerto he is really more pitiful.
- Both have children in them though, the main couple does not conceive a child in P.S. Man
-Really good chemistry between leads
-Amazing dramas, they don't drag
-Autumn's concerto is more enjoyable because its an one time drama nothing can recreate it even if it has an cliche storyline
-Also there are no annoying female leads in both the dramas
-P.S. Man uses the childhood friend trope xD...

of the similar story where the rich fall for the poor and experience obstacles because of the difference in social class. Except Autumn's Concerto is much better in my opinion.

Ren Guang Xi, a cocky law student, seems to lead the perfect life. He's the sole successor to a huge and famous business and is a talented ice hockey player. But in reality, his lonely life lacks joy, laughter and motivation. That is until he meets Liang Mu Cheng, the new bento seller at his school canteen. A harmless bet brings the two together and Guang Xi slowly changes as Mu Cheng teaches him how to give and love. Tragedy strikes when Guang Xi suddenly has to go through a major brain surgery which causes him to lose his memory.

-Both are tear-inducing ROMANCE MELODRAMAS where the leads know each other for years and struggle through obstacles to get maybe together
-Both have AMAZING chemistry between the leads

while AC is the long version
EWS is somehow the shorter version.
so what they have in common?
- FL madly inlove with the ML
- another woman who loves the ML and gets the ML's mother support.
- breaking up the marriage
- meeting many years afterwards, the FL secretly gave birth to the ML'S child and raised him/her on her on.
- the ML insists on remarriage.

-Both are tear-filled ROMANCE MELODRAMAS where the leads know each other for years and struggle to get maybe together
-Both have EXCELLENT main pairing with great CHEMISTRY

The leads have both experienced painful things in their pasts. While watching, they both have a similar feel, though the plots are quite different.

Ren Guang Xi, a cocky law student, seems to lead the perfect life. He's the sole successor to a huge and famous business and is a talented ice hockey player. But in reality, his lonely life lacks joy, laughter and motivation. That is until he meets Liang Mu Cheng, the new bento seller at his school canteen. A harmless bet brings the two together and Guang Xi slowly changes as Mu Cheng teaches him how to give and love. Tragedy strikes when Guang Xi suddenly has to go through a major brain surgery which causes him to lose his memory.

Both dramas have similar story trope where The ML get memory lost but with different reason. Both of ML is quite temperamental but changing softer and nicer when they were amnesia. Both of FL fallen pregnant with ML after the ML left (because of the amnesia). ML and FL met again after 5 years accidentally and the ML started to regain memory vaguely about the FL but the FL kept avoiding the ML. Both of FL kept denying the past relationship between her and ML and lied about their son existent.

In both dramas, the main leads go into tough time to get what they wanted and ended up falling in love with each other. They both are really sad and are good dramas.

Both series have the notion of having a baby and not knowing it. In both movie & drama many popular Taiwanese, HK, Korean & Chinese stars.

South Korean student Dong Ha met a Chinese student named May while studying in America several years back. The two students became friends but didn't realize the bond they had until they went their separate ways. Now, as an architect, Dong Ha travels to China in lieu of a business partner to work on a construction project. By coincidence, Dong Ha runs into May again, and they share their memories spent together as students in America. Dong Ha and May fall in love once again...

24-year-old Murakami Maiko is a very sheltered girl who has never had a relationship with a guy. It is decided that she will go for a matchmaking session with someone recommended by her father Genichiro who owns a company. The man Hanasato Harumi is 20 years her senior and also a divorcee. Although Maiko is less than thrilled, she discovers when they meet that he is a charming man with an air of maturity and she instinctively makes a move on him. Harumi had intended to meet Maiko once before he turned her down since she is the daughter of the CEO of an important client. However, she turns out to be more than he had imagined. Maiko confounds him the whole time but he is attracted to her straightforward, pure, and dignified nature. He accepts the completed marriage registration form from her on their third date after she presses him for a kiss. They get married despite their 20-year age gap, and their life as newlyweds begins.

After finally getting the courage to confess her feelings, Qi Yue was handing her love letter to Yuan Yi, but by a stroke of bad luck, he did not see and walked passed her. The person standing in front of her was the troublemaker of the school, infamously known for his devilish ways - Jiang Meng. The devil will get what he wants, and the object of his desire was Qi Yue. Although having a cruel exterior, Jiang Meng's heart is kind and caring, which truly touched Qi Yue. The big problem remained - Jiang Meng is the son of the man Qi Yue's mother is going to marry.