ShuviLily

After putting a suggestion to add a mercenary in a bad Murim novel he read, Leo would finish a mission with his NPCs before sleeping. 
Or so he planned.

For some reason, he was transported into the said novel as the extra mercenary added by the author. His loyal NPCs, a yandere secretary, a happy-go-lucky assassin, a sexy puppeteer, and two weapon maniac guys start to become sentient.

He lead his mercenary band 'Hallowed Insects' toward an an unprecedented future in a Murim most turbulent era while enjoying his time.

Fortunately, they still have their futuristic equipment with them. Tang Clan have a Poison Dagger, they have a Photon Sword. Shaolin Sect has a Qi Blast, they have a Railgun.

And of course...

"How much are you willing to pay to employ us? By the way, Demon Sect pay us 50,000 Golds to join their side in the upcoming war."

... he always sided with the highest bidder.
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Warning: Story with R18 element

Mercenary Harem in Murim Novel

"So that was how we met. He let us off and gave us food that night." Jack smiled as he remembered that memory. "Of course, after sis Jessica beat me up. But it was a great day."

Astrid, who listened to his story, could only smile wryly.

"Jessica was... a sadistic person from the beginning, huh?"

"You have no idea." Jack shrugged and downed the last of his alcohol before putting it back down again. He leaned against the chair, and his expression turned somber.

"Life in the slum was harsh, especially in those years where the government cut the welfare budget to support the war. Dangerous mercenaries that lost their job in the war came and started a gang war. There was a time where we were so hungry we stole anything from a store just for a day of food."

"..." Astrid listened to his story silently, not saying a word.

Jack then took another deep breath and smiled. "Well, to be honest, I betrayed the Leader once."

Chapter 213 – No Rest For Mercenaries