Snowstar

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet." 
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
***
Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
**************
Author's current works: War Online, My Soul card is a Reaper
Author's other notable works:  The Last Slytherin, The Sharingan Hyuga
**************
You can also support the Author through Patreon

https://www.patreon.com/snowstar

Weapon seller in the world of magic

Once he left and the store was closed, Song Yue finally realized that they were alone. As for Alina and Allen, she knew that they aren't humans and could no longer bring herself to look at them as humans as she did before.

During the last night, her emotions were unstable. So, she didn't think too much about it but now, as her emotions were stable, she suddenly remembered that she was living alone with a man, a particularly handsome one at that. Her heartbeat couldn't help but beat wildly due to nervousness.

Thankfully, Mark was the same as before. That eased her up a lot. Slowly, they became busier with normal talks, although it's just mostly Mark telling her about his adventure in the Western Moon kingdom.

"As they are almost at the end of their conversation with the clock hitting 10 p.m., Song Yue put forth a sudden request.

Trouble for Mark?