In SKA, "Corruption" refers to an abstract resource that accumulates mainly through sexual and/or immoral acts, and using Aura's Star Knightess ability. Its primary use is to be spent on mental changes in Aura's mind, which advances the storyline in Aura's daily life. If it is above capacity after Alicia's daily action, a Soul Break Game Over is triggered, so care must be taken to manage its intake and expenditure.