Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 3 - 3-2. Master of the Beastkin Girls

In a distant future, Alexander wakes to a reality where his past is a fog and his consciousness inhabits a robot body. Faced with a fragmented memory and an uncertain future, he embarks on a quest for answers. Amidst the hum of his repair shop, where he scrapes by, he delves into the mystery of his transformation. As Alexander forges ahead, stitching together the threads of his identity, unexpected companions join his journey. Among them is a precocious girl whose presence sparks forgotten emotions, offering a glimpse of his lost humanity. Yet, in the shadows, lurk those drawn by his technological prowess, casting ominous shadows over his path. Caught between the pursuit of understanding and the threat of those who covet his abilities, Alexander confronts a pivotal question: will he succumb to adversity or emerge from the crucible stronger than before?

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.

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

William and his college class are ripped from Earth and thrown into Aethel, a world on the brink of collapse. Everyone gains incredible magical powers – except William. Mocked and underestimated, he’s an outcast among heroes. But William has a secret: an SSS-ranked skill that lets him travel to Aethel’s past. Learning lost magic from ancient masters, he’ll surpass his classmates and become the true savior Aethel needs. But can he overcome the dangers of the past and present to forge his own destiny? While others studied about the first mage, William could go back in time and see the first mage himself! While others dreamed of seeing a dragon, William could go back in time, hatch a legendary dragon egg and turn it into his puppy. While others used common materials to craft their items, William could go back in time and mine materials that weren’t find anywhere in Aethel anymore. Is it unfair? Perhaps, but William was not the type of person to not use the powers the universe gave him.