TRAINED TO BE 𝐇𝐄𝐑 ( BTS FF )

"Where should I sign?" Jia questioned me.
"Sign is for kids" - I smirk as my gaze trailed from her tears-welled-up eyes to her cupid bow lips, taking a step forward, caressing her lips - "Let's seal our deal with a kiss."
Shoving my hand away, "F**k you!" she gritted her teeth in anger.
"No kiss. No deal. Your loss."
Perceiving there is no time left to argue; She pecked my cheek.
It tickled like a snowflake caressing me dearly.
"We sealed our deal. Now, go. Do as we spoke."
"I said kiss, not a peck. There is a difference between a kiss and a peck. Kiss involves the tongue."
Seeing her irritant because of me is the best thing. She groaned in annoyance before pressing her rose petal lips against mine.
Before our contact of lips breaks, grabbing her closer, causing her to gasp, I instantly took advantage of her opened mouth, entered in a wave that hit her like thunder exploring her tongue. I intensified the kiss watching her tears escaping her eyes. Helplessly she stood pressed against me with her raising pulse. Leaving her short of breath, I broke the kiss.
As her cold gaze interlock mine, she said, "I hate you, Tae."

Can a normal girl's life change with a kiss? Well, her life changed to the lethal. She astonishingly went from saving people to slaying people. What so hurry Jia Kissed Taehyung that led to give up on her dreams and walk into a vicious place filled with sins and crimes?
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Violating the Golden rules of the Bangtan, Jungkook receives a harsh penalty; and the other members are commanded to train Jia for the missions of mafia affairs to accompany them in taking down Night Dragons, the ultimate enemy of the whole mafia world.
Unfortunately, a deal Taehyung engaged in exchange for revealing his beloved box's location stopped them from commencing the training progress. Further, the deal contained a lot more that transformed Taehyung's walk of life ridiculously.

What cunning deal it was? Will Taehyung able to crack it to commence the training?