MTL - Metropolitan System - Chapter 1862 Jiang Jiazhi's dragon?

The eldest son of the assassin aristocrat Tuatha Dé.

The skill, experience, knowledge of the previous life, magic, all of which grows his power as an assassin.

Excellent assassins pass through. He was usually admired as the ideal lord, and behind it wielded a blade as an assassin aristocrat.

An ordinary youth living in the year 2050 in the Western calendar accidentally came to a fantasy world created by the collision of magical elements and supernatural technology at the other end of the dimension…

- Description from novelbuddy

Somehow, the protagonist Kim Jin possessed a rich pushover extra in a novel who was exploited by the villainess and then met their demise together.But there’s no way Kim Jin would let that happen! He immediately defeated the villainess and locked her away. After that, the only thing left was to steadily enjoy life in this world while investing and extracting profits using his knowledge.But why… the more he punished her, it seemed that the villainess he had captured began to cling to him too much?

A tree of 10,000 flowers, the world is the door.
The spells change a lot, but the hearts of the people are unchanged.

- Description from Uukanshu translation