Blackstone Code - Chapter 132:

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.

With the sudden announcement of the launch of the holographic virtual network, Chen Mo, a hacker, received a special commission to hack this system in a bid to halt advancement.

To complete his task, he enters GENESIS – the holographic virtual game touted as the most secure – to look for a way to hack it. In his search, he inevitably becomes a terrifying force to behold.

- Description from Novelupdates

A mysterious force has descended upon Earth, giving birth to another terrifying civilization. At the age of eighteen, everyone is forcibly sent into the Horror Game World. While people struggle to survive, submerged in fear, Qin Nuo discovers a unique ability: by influencing the emotions of ghosts, he can earn rewards from the system. Moreover, with each completed mission, he can establish his own enterprises within the Horror World.Thus, Qin Nuo's journey begins:Working as a server at the Nether Springs Restaurant,Serving as the attending physician at the Death Hospital,Becoming a waiter at the Netherworld Hotel,Teaching at the Terror Academy...As Qin Nuo zealously completes one mission after another, he eventually realizes that he has become a formidable figure in the realm of ghosts.

On his usual way to home Mikado Tsuchio fell into a hole that suddenly opened on the ground. Just like that, Tsuchio falls in a different world, he lands on a Grappler Wyvern and manages to tame it.

Tsuchio decides just like that to live in the other world, the reason for his quick decision: he wants to make a monster girl harem.