My In-Laws are Obsessed with Me

 (시월드가 내게 집착한다, 媤World가 내게 執着한다, Siwoldeuga naege jipchakanda) is a fantasy Webtoon Original adapted by seungu and original work by Han Yoon seol; it updates every Wednesday. The original Korean Webtoon premiered on Naver.

The Webtoon is based on a web novel (English, App-only) by the same name created by Han Yoon seol and illustrated by Bon.

Synopsis
''Pereshati Jahardt is a count's daughter who got remarried after her mother’s passing. When her father died, he left her all his fortune. Then, Pereshati's greedy stepmother and stepsister conspire with Pereshati's lover to kill her. However, under mysterious circumstances, Pereshati is brought back to life and travels back in time before her murder. To buy some time before getting her revenge, Pereshati visits the handsome yet notorious grand duke, Therdeo Lapileon, to marry him. During her visit, she uncovers a horrifying secret of his family. How will Pereshati deal with it? Will she be able to take her revenge?''

Pereshati Jahardt
The central protagonist and daughter of Earl Jahardt, Pereshati is killed by her stepmother, Reina, and Schiff, but is transported back in time before her death. She marries Therdeo in order to protect her life and family fortune.

Earl Jahardt
Pereshati's deceased father. He had heart disease and was frequently bedridden, which was believed to be the cause of his death. In Episode 58, it is revealed that his death was not due to his illness but due to being poisoned by Pershati's stepmother, using the Lapileon's blood.

Countess Jahardt
Pereshati's stepmother who helped kill her in her original timeline. She is revealed to have had a hand in murdering the Earl.

Reina
Pereshati's stepsister and one of the accomplices in her original death. She currently serves as a companion to the Fourth Princess.

Lapileons
The Lapileons are a reclusive, powerful family who currently hold the title of Grand Duke. Their blood is cursed to kill anyone whose body it enters.

Therdeo Lapileon
The present Grand Duke, known for being a "bloodthirsty war fiend" after his victory in the war against Schwartz. He marries Pereshati after realizing she comes back to life after exposure to their blood.

Saoirse Lapileon
Therdeo's older sister and head of the Labrons, their family's guild. Although the Lapileons do not allow women to inherit, she took on the title after her brother's death. However, her husband and child died from exposure to her blood and she gave up the title of Grand Duke.

Celphius Lapileon
Therdeo's nephew, he is the heir to the Grand Dukedom. His father was Therdeo's deceased older brother.

Gloria Lapileon
The oldest living member of the household and the current head other than Therdeo.

Phineas Lapileon
The family doctor and uncle to Therdeo and Saoirse. He adopts Islette after Gen is apprehended.

Islette Lapileon
The illegitimate daughter of Gen. She was abused by her father, who was earning a profit by selling her blood. She is found and rescued by the Lapileons and adopted into the family.

Gen Lapileon
Islette's father, who acted as one of the family's doctors in the past. He looked after Therdeo and Saoirse when they were children. He is imprisoned and sent to Master Cripp's house after it is found he was selling Islette's blood.

Castor
The royal family of the Castor empire, who with the help of the Lapileons, won the war against Schwartz.

Dodolea
The Fourth Princess, in the original timeline she was sick and confined to bed. However, at present she is healthy, and wishes to marry Therdeo, to the point of obsession.

Seventh Princess
In the original timeline, the Emperor tried to marry her off to Therdeo. She is very young and is of school-going age.

Web Novel

 * w:c:web-fiction:My In-Laws are Obsessed with Me: A web novel of the same name created by Han Yoon seol.
 * YONDER (English, App-only)

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My In-Laws Are Obsessed with Me My In-laws Are Obsessed With Me 시월드가 내게 집착한다