Opposites attract?

The happy Loner (2eps): he's a solar extrovert and she's a loner. 

Flowerboy Next Door: She's a recluse with agoraphobia and he's solar, outgoing and happy.

Love the Way You Are (C-movie): Young adults. He's a hardworker and she's lazy. 

Let's eat: she likes to be left alone, he NEEDS to be friends with everybody. Not really a straight up romance, more than a friendship). 

PLease Come Back Mister (friendship): She was a (male) mafia boss and he was a softspoken nerdy family man. They died and reincarnated and became friends out of necessity. 

King2Hearts: He's spoiled prince, she's a hardworking military officer. 

• Stranger / secret Forest - partnership between a prosecutor who lacks emotions thus is cold and rational and a police/cop who is a straight shooter who goes for he r hunch. 
• The Good detective - friendship/partnership between a diligent and righteous cop and n unsympathetic goes bye his insight cop
• Black and White - friendship/partnership between two cops, one with a devil-may-care attitude and the other with a straight-laced by-the-book the personality 
• Eternal Love of Dream - romance between the playful princess of the foxtailed clan and the all knowing and very solemn first emperor of heaven
• Plan Man - movie where He has OCPD abd she is a messy free spirit
• I Can Speak - movie of a feisty grandma who makes/writes report/complains and a strickler for rules young man who works as a civil servant
• A Long way home - movie during the korean war when 2 men met alone in the western front, one is a south korean and the other a north korean
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Kahogo no Kahoko

Koizora

Kuragehime

• +1 The Happy Loner - Two emotionally vulnerable and lonely people with opposite coping methods. The FL is extremely cold and distant in order to protect her heart. The ML is extremely energetic, clingy and affectionate, but his clinginess / desperation for affection ends up smothering others and pushing them away. 
• Crash Landing on You - A successful businesswoman from capitalist South Korea. She comes from a wealthy family but lost her mother when she was young. Her father remarried and her family excluded her and treated her poorly. She built her own successful business and her work-obsessed, demanding and egotistical personality is a defence mechanism stemming from her family situation and loneliness. The ML is a captain serving in the army of communist North Korea. He also lost a family member and became emotionally closed off, but his loss makes him more humble (he comes from a powerful family - his father is director of the General Political Bureau and vice-marshal of Korean People's Army - but he chooses to keep his family connections a secret) and he is very polite and helpful to others in an emotionally distant way.
• The Untamed - LWJ is a quiet, serious and disciplined person and is the second young master of a clan with 3,000 rules. WWX is the orphaned son of a servant, but was adopted by the Jiang clan. He is a care-free and mischievous person who loves to joke around and break rules / conventions. WWX loves alcohol while LWJ doesn't drink. WWX chatters and talks to everyone and easily makes friends, while LWJ is mostly silent and rarely interacts with anyone other than his brother and uncle. LWJ is always respectable and upright with a spotless reputation. WWX becomes universally reviled for using dark cultivation methods, breaking conventions, accumulating power, going against the clans, and more.
• Witch's Romance - After a difficult experience, the FL doubles down on her work as a journalist for an independent magazine. She becomes jaded, cold, rude and obsessed with her work. The ML also has a difficult experience which prompts him to give up his current career path. He starts an errand boy company with a friend and is a kind, warm and compassionate person who always helps others. They also have a 14 year age difference. The FL is 39 and the ML is 25.
• HIStory3: Trapped - Tang Yi is serious, suave, cool-headed, and mysterious. He is the leader of an organized criminal enterprise. Meng Shao Fei is a goofy but honest police officer dedicated to exposing the truth and getting justice.