The Villain's Survival Instruction Manual - Chapter 31: Death On The River Acheron[1]

This is a prequel to the anime movie To Aru Majutsu no Kinsho Mokuroku – Endymion no Kiseki.

Just before the completion of the Academy City space elevator “Endymion”, the main characters Kamijou Touma and Index encounter a level 0 girl named Arisa. The Magicians are after Arisa, and they attack Academy City. A female leader named Shattoaura leads a unit from Academy City against the attack. Kamijou and Index learn from Stiyl that Arisa is key to a brewing war between the sides of Magic and Science. When science and magic cross paths, the story begins with Endymion as its stage!

Past, present, and future, I will always want you.

Adeline had a plan to obtain her freedom:

Step one: kill the King.

Step two: run away and live happily ever after.

Did that happen? No.

Adeline’s plan was rudely interrupted by a mysterious, yet handsome stranger who stole her weapon at midnight.

Elias Luxton was a heartless King notorious for his merciless antics. He was the monster that lurked in the shadows.

Adeline Rose was a dethroned Princess with a dark past. After her parents’ murder and an super stealing her throne, she flees to the Empire of Wraith and unexpectedly meets Elias.

Elias claimed he knew her. But she didn't remember him. And Adeline wants nothing to do with him.

The problem? Adeline was supposed to kill him, but he wants to marry her.

Will she be able to escape the clutches of this shameless King? Or will she have to face the demons of her past, all alone?

The Capital’s girls look on with hatred, “ You’re just a country girl without any knowledge. Do you have Niyun Shop’s clothes? Do you have Brilliant Treasure Pavillion’s jewellery? Do you even know how eminent and domineering the famous Yue Wang is?

Mu Yunyao looked at them lazily, “ Niyun Shop? I opened it. Brilliant Treasure Pavillion? I opened it. As for Yue Wang…when are you returning my silver?”

Yue Wang’s face was cold: “I will pay with my body.”

(Wang means King. In this case, “Yue Wang” was a title given by the Emperor to his son.)

After being reincarnated, Mu Yunyao believes in three things: One, do not have good intentions towards others. Two, do not let the enemy have the chance to rise again. Three, do not believe in feelings. Thus, she is merciless. She is fearless. She would rather have everything destroyed than to compromise for everything.

However, after one fateful meeting, a cold-blooded prince keeps following her, silently plotting on making her his wife and bringing her back to pamper her…

- Description from Novelupdates