I The Weakest Hero Was Reincarnated A Second Time

[WARNING: 18+ Content! Viewer Discretion Advised] Liam Phobus Ito. A human from a highly advanced civilization was reincarnated as the weakest hero in another world, but as useless as he was, that didn't stop him from becoming an inventor to use against the demon lord in his world, that is until he went adventuring with his companions and died by one of them. But once reincarnating again in another world he realized there was no magic to use or electricity and minerals to invent with! How will Liam cope with this new world, will it be kind to him or will it betray him once more?