Empire of Lust (2015)

Lee Heon is the king of Joseon. 7 years ago, when he was a crown prince, his beloved wife died. To this day, he has not been able to get over her death. For the past 7 years, the royal family and government members have tried to get King Lee Heon remarried without success. The nation has also implemented a geumhonryung edict, which is a ban on all single women marrying during this time when the king has not married. People are furious over the marriage ban. One day, King Lee Heon hears of a woman named Ye So Rang, who claims the spirit of the king's late wife exists within the royal palace. Meanwhile, Ye So Rang is a swindler and claims to interpret marital harmony signs. She is arrested and jailed where Officer Lee Shin Won works. To get out of her predicament, she pretends to be possessed by a spirit in front of Lee Shin Won. During her ruse, she mentions that the spirit of King Lee Heon's late wife exists within the royal palace. She is then brought in front of the king and he asks her if she can really see his late wife's spirit. To survive, Ye So Rang acts like her body is possessed by the king's late wife. Ye So Rang's lies get bigger and more audacious.

The series tells the story of a man-turned-immortal, Bulgasal, who wants revenge from a woman with a mysterious past and present, who he deems responsible for his immortality and miseries from the past 600 years, hoping to free himself from his curse.
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If you liked Jang Hyuk as Lee Bang Won and want more - try this.

one is tv series, another movie, in both Jang Hyuk plays Lee Bang Won and is amazing. Of course same time period and historical events.

in both except for Jang Hyuk/Lee Bang Won there are 2 male leads (in tv series Jang Hyuk isn't listed as main lead, but he is quite main character and star of the show, though not only star because 2 young leads are also amazing and bromance is best ever)

In his early years, Oda Nobunaga picked up the nickname of "The Fool of Owari" due to his bizarre behavior. He later married Nohime, but their relationship was not very good. Their marriage came about as a political marriage between hostile neighboring regions. Oda Nobunaga accepted Nohime as his wife with an arrogant, authoritative attitude. Meanwhile, Nohime has an unabashed attitude and easily clashes with her husband. They are like oil and water.

One day, Oda Nobunaga’s enemy Imagawa Yoshimoto attacks Owari with his vast army.

Oda Nobunaga is devastated by the overwhelming gap in military strength, but Nohime encourages Oda Nobunaga to not despair and fight against his rival. Oda Nobunaga and Nohime draw up a tactical plan to take on the much larger army. They soon make plans to unify the entire country, which has never been successfully done.

In 18th-century Korea, Prince Yi San is a perfectionist haunted by his father's murder. He's set to inherit the throne once his cruel grandfather, the current king, passes away. Despite the emotional scars left by his father's death, Yi San aspires to be a benevolent ruler who reforms the kingdom's laws. At court, he encounters Sung Deok Im, a spirited and intelligent young woman. While Yi San falls in love and proposes she become his concubine, Sung Deok Im grapples with the restrictions and responsibilities that come with royal life. However, as their love deepens, she begins to see the potential to bring positive change to the troubled realm through their union.

The New Yoshiwara pleasure district, in the twilight years of the Edo Period. Popular prostitute Asagiri will soon be freed from her indentured service. One day at a local festival, she meets young artisan Hanjiro who changes her destiny. Asagiri feels love for the first time in her life, but the history involving Hanjiro's client leads to tragic circumstances.

Min Jae Yi, a gentle and poised daughter of a prominent family, is engaged to the son of a powerful State Councillor. Devoting herself to learning everything she needs to know to become a good wife and mother, Jae Yi dutifully prepares for the future. Sadly, destiny has other plans for her future.

Just days before her wedding, tragedy strikes when her family is brutally murdered, and Jae Yi is falsely accused of the crime. Amidst the turmoil, she crosses paths with the cursed crown prince, Lee Hwan, who agrees to help her in exchange for her assistance in breaking his curse. As they navigate their challenges together, Jae Yi and Lee Hwan begin to develop unexpected feelings for each other. But their love faces countless obstacles, including their pasts, their uncertain futures, and the threat of the curse. Can they overcome these challenges and find a way to be together?