Kuroitsuki

Xion Aijawa thought his life was finally coming together. That is, until he tried saving a cat stuck in a tree, fell into a pit, and... died

In his disoriented sate of "Freshly dead" the silly Xion accepted a strange request and ended up transmigrating into the world full of dungeons and Mana. 

He became illegitimate child of Marquis family hated by his three siblings.

According to the memory of the original owner of the body, Xion only had a month to live.

So, taking the cover of the banquet, Xion ran away. Aided by a mysterious Mall System, he makes his way to the distant borderlands, hoping to put his past behind him. 

But fate has other plans-. Xion ends up saving Darius Rael Darkhelm, the feared Archduke of the North, notorious for his ruthless and deranged nature. 

The silly Xion tried to run away but...

 Xion's heart thumped loudly as Darius effortlessly pinned his wrists using only one hand.

"I've heard you tried to run away."

Darius gently caressed Xion's pale cheek, "That must be a lie... After all, I've given you things even the royal family can't have. Isn't that right, my dear healer?" 

Xion gulped when Darius's thumb brushed his lower lip as a chilling smirk remained on his handsome face.

 "I-I think I should leave, Your Grace. I've overstayed my welcome..."

The room grew cold, and struggling Xion shivered.

 Darius's green eyes dimmed before lighting up with a dangerous glint. 

Xion felt a pit growing in his stomach when he saw the deranged archduke smile. Darius never smiled. And whenever he did, it only meant trouble.

"You're right," Darius said calmly. "So, let's get married."

Xion "...!!!!"
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This book will lean toward dark romance, but there will be no r@pe. This author doesn't like glorifying SA as romance.

[BL] Accidentally Becoming the Healer of the Deranged Archduke

"What's that?" Xion motioned toward the painting on the wall.

The lady turned around, a soft smile gracing her lips, "That is a depiction of the third great war. Magnificent, is it not?"

Xion decided to ignore her question. Just a little revenge...

Even if he did not want to drink it, Xion still could not go against the lady's wishes.

Despite his urge to smash the cup against the rune on the ground, he could only bring it to his lips and take a tentative sip.

He was ready for a similar sort of blandness to hit his taste buds. But the tea was sweet with a hint of honey and a delicate floral note, perhaps jasmine, that lingered on the palate.

At the very least, his throat was no longer painfully dry.

Only after he had taken a few sips did the lady decide to speak.

"Are you that Devil Archduke's healer?"

The silly Xion wondered. The only Archduke he knew was the father of Rael.

Devil Archduke and Sacred Text