Strongest Survival by Otome Game’s Heroine (LN) - Chapter Volume 4 9: Dungeon Exploration Deepest Area

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.

She was a medical genius from the Noah Medical Academy as well as a drug producing specialist. After sleeping for three days, she had returned to the ancient era and become the loyal marquis palace’s ignorant and silly young miss.

He was the supreme king of the Jia Luo Kingdom, with prestige around the whole world. With an ice cold face and a ice cold manner, he was entangled by her strong and overbearing manner, vowing to never let go.

Accidentally falling on him, he said, “This king will never suffer a loss.” Never suffering a loss, so he kissed her back.

Accidentally hitting his face, he said, “This king will never fight with a woman, I only nip women.”

Five fingerprints. Not only has he nipped her five times, he still collects interest.

- Description from Novelupdates

The next morning, Eleanor woke up in an unfamiliar room, sun streaming through the window. Beside her, the man from last night was fully dressed, sipping coffee. His expression was cold.The vague memories of last night returned in snippets. “I didn't mean… I was drunk,” Eleanor stammered.Liam raised an eyebrow with a small sad smile playing at the corner of his lips. “Save it. You're not the first to try to seduce me.”Eleanor's anger flared. “I wasn't trying to seduce you! And I'm not some prostitute.”Liam's gaze hardened. “Well, I'm not here to judge you, but don't expect any more than that.”With that, he turned and left, leaving Eleanor stunned.*******Eleanor's life instantly changed when she lost her job and got into a contract marriage with Liam Chase, a ruthless and possessive billionaire who agreed to pay off her debts. Life with Liam was a difficult one as he was cold to her. She found solace in the hands of his cousin and became pregnant for him.But what happens when she finds out that her billionaire husband is linked to her past?Will she easily let go or will her past hunt her forever?Will Liam's cousin come to her rescue or is she doomed forever?Dive into the book and find out more.

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.