Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 2 - 2-7. Demon Return

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.

After the disaster, there wasn't enough food, so I used my superpower to farm, striving together with my childhood friend for a better life.

A replica of Marquis Kieran Vale, the son of the Marchioness of Vale, who she deemed a failure. That was all she was. No, she was now referred to as “he.” At least until she met Claude Del Ihar.

In Heaven’s Vault Continent, Colossal Dragons, Titans, Beast People, Fairies, Magical Beasts, and other races reign supreme!