Dungeon Keeper Ami

A "Dungeon Core" LitRPG featuring Sailor Mercury. I was initially interested in this story for the interesting take on "good guy forced to be evil", but the MC's constant poor decision making and naivete eventually got on my nerves. Unfortunately, it felt like the story fell into a loop of the protagonist thinking "what could go wrong? I know everything about this thing I know nothing about, this can't go badly" then that thing going badly.