Leveling up girls in another world

Barely escaping death by being summoned into another world, Tomokazu gets the task to save a world he already saved once a couple of years prior. This time however he faces way more obstacles than last time because our hero cannot defeat the demon queen on his own. She took precautions and made herself immune to damage dealt by male heroes, forcing our protagonist to recruit and train skilled women. Tomokazu and his team travel Aporia to find new allies and hints on the whereabouts of the demon ...