Nepventure: START!

"That should be enough," Gazing at the Afternoon sky, the young man sighed while taking a quick look at the gathered herbs he had.

This man is Ren Cruz. He was an ordinary young man but he died, killed by truck-kun but he was Isekai-ed into another world. Given a chance, he took it and now has badass powers that will make any stupid generic Isekai MC self-inserter cream their pants. 

Currently, he is on a job for the guild in the country of Lastation. A steam-punk-ish country which was not that bad. Just ignore the budding megacorporations and stay out of trouble then you will be fine. 

What? He is not some kind of self-righteous person or something

Back on track,

He got his cheat, a class system. While he only had his weakest class in terms of sustainability, the Dragonslayer general class. 

"Having fun?" Brown hair danced in the wind as a figure clad in a blue coat smiled at him.

IF, the Wind Walker of Gamindustri, said with a smile as she sat on the sack of loot I got for my quests. 

"Not really, I just finished my quota for today," he said while looking at her. Unlike her, he was dressed in a relatively simple attire similar to those worn by Witchers of the School of the Wolf. An enhanced wolf school gear dyed in black.

Just like IF, he wore a trench coat of his own. A red trench coat that would make the legendary demon hunter proud. 

"I'm heading to Planeptune for a job-," 

"No, I don't want to get dragged in another... weirdness with you," Ren said as he closed his sack before storing them in his hammerspace. "The last three times were enough..." he remembered the time they went to exterminate some Dogoos and he managed to see her get pissed off firsthand after some of them managed to... lick her armpits. 

This world is weird! 

"Aw, come on! Is that how you want to treat your savior!" IF whined teasingly only to immediately move and stood back-to-back with him. Sensing the enemy, the young man sighed as he pulled out his sword. It had a meter-long blade with a handle that could be used by one or two hands. It looked beautiful looked dull. 

"A dragon, huh?" Ren whispered, resting the blade on his shoulder. Standing taller than his friend, the young man sighed as he activated his skill. 

"This is your specialty," IF said with a smirk. The red parts of his attire turned green as he looked at the dragon and roared.

In an instant, the Ancient Dragon's blood fell to the ground as a massive and deep gash appeared on its arm that was split in half until its elbow while he landed on the shoulder of the dragon. 

A roar of pain erupted from the ancient dragon, only for a roar from the man on its shoulder to shut it up.

Meanwhile, safe and sound away from the Ancient Dragon, IF smirked as she took out her cell phone. 'Ren might be a newbie, but,'

A wing fell to the ground as the pristine light blue blade of the young man shone with sunlight the poor Ancient dragon was pinned on the ground after the dark-haired young man cut through its right ankle, 

'Compared to most, he excels in destroying many things,' IF said as she watched as Ren wordlessly and effortlessly eliminated the Ancient Dragon. 'But when it comes to Dragons, then he is probably the best in the entire Gamindustri,' IF thought with a wince as Ren decapitated the deceased Ancient Dragon that would make many veteran guild members have trouble on their own. 

"Well, my friend," IF said as she looked as Ren stored his sword inside his hammerspace while the green trench coat returned to its crimson shade.

"No, Screw you guys, I'm going home," Ren said as he walked away, leaving IF by herself. 

"What?! Get back here, Ren!" IF shouted as she ran after the taller blonde as the Ancient Dragon's corpse rapidly decomposed until it turned to ashes as if it was ravaged by time.