MTL - The First Assistant Teased Me and Gave Birth To a Cub - Chapter 15 involuntarily

[SoL Heavy][Ding! SSS-Rank Service System Activated!][Ding! Daily 10x Reward Multiplier Initialized!][Ding! Job Gained: Junior Sanitary Engineer!]Reincarnated as Dorian in a fantasy world, a PhD student in Business and Marketing decides to become the richest man alive with the help of a system and also improve his new world's economy.Dory doesn’t need a sword to win. With his SSS-Rank Service System, he treats every small job like a big business deal. His 10x Reward Multiplier turns simple work into a mountain of money and gold.[Ding! Skill: Material Restoration Acquired!][Ding! Skill: Spatial Optimization Acquired!]He can make old, rusted tools look brand new. He can organize a messy shop so it works faster and better. He is bringing modern skills to a world that is dirty and slow. Whether it is a broken house, a messy warehouse, or a poor kingdom...Hire him to fix anything and everything! Cause he has an SSS-Rank Service System!**********What to expect:Very Slice of Life: A chill story about doing a good job and growing a business.Low Stakes: No big scary battles. Just fun, work, and making money.Smart MC: A PhD student using modern ideas to fix a fantasy world.Modern Jobs: Using modern professional skills to change the world.Road to Riches: A slow and happy story about becoming the wealthiest man alive.Harem: A focus on romance and relationships (No Smut, No Yuri, No NTR).

Jacob Steve, an Old Man, died at 116 after living a whole life.

But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.

He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.

However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!

In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.