it's not too hard. did that on the first playthrough. didn't realize that the side characters that fight alongside each girl has a corruption value as well that will determine whether they have a human form in the ending or an insect form
Out of recent corruption games "Agent Sirius" stood out to me >>>>. Out of Power Rangers/Insect-ts - I'm coming dry. Not counting, but of course keeping in mind Corruptions of Championses with its complimentary insect-ts