Later, He Became A Royal Healer - Chapter 15 - Substitution.

Victor was a normal 21-year-old man, he grew up in a loving family that helped him take care of himself knowing that he had a practically incurable disease, the RH null blood, he was the owner of a rare blood type…

But what Victor didn’t know, is that this blood type was a delicacy in the supernatural world, creatures that fed on blood loved his blood type…

And that blood he hated would be the factor that would make Victor the greatest vampire of all time.

At the movie premiere, a curious reporter notices the marks on Xia Siyu’s neck. “What’s that?”

Xia Siyu flicks her hair carelessly. “A mosquito bit me.”

After returning home, Bo Yan pins her against the wall, his voice teasing yet dangerous.

“A mosquito? Do I need to bite you again?”

Xia Siyu gains weight easily and is always fat shamed with words like being “as fat as a pregnant woman”. One day, she is mocked so harshly that she appears on the top searches. While everyone thinks of it as another joke, the movie star, Bo Yan, replies unexpectedly, “Thank you for your well wishes! Our baby is already three months old.”

Life is unpredictable. Her husband loved her stepsister, deposed her as Empress and even forced her son to death. In that Cold Palace, she was forced to drink poisonous wine. So in the next lifetime, she made a promise to never do good deeds and help others, to never step into the palace and to never become the Empress!

At the Prime Minister’s estate, the mistress’ daughter is reborn into a she-devil.

An evil stepmother? I will make sure you go to Hell!

A two-faced, hypocritical older stepsister? I will rip apart that beautiful façade!

A scheming younger stepsister? I will throw you into the grave!

You guys didn’t let me live peacefully so you should also expect the same!

Initially she wanted to stay away from disaster as far as possible; however, a man’s heart is like a needle in the sea—impossible to search for, impossible to understand.

The man who once swore to abandon her became someone who can’t live without her.

The enemy from the past lifetime suddenly confesses his feelings for her.

Even worse, she is bothered by a handsome man with a thick-skin who doesn’t know how to give up!

- Description from Novelupdates

The story is about a man whose compulsive tendencies make it impossible for him to keep a job, and a young girl who skips school and loves insects. The two meet, come to support each other in reintegrating into society, and fall in love. There’s a problem, however: namely, the parasites in their heads.