Per usual for Mirna's current life, she was being ravished by the Demon Lord. The Demon continued to pound her, yet, despite the constant attempt by him to break her and pushed her into the hedonism, she continued to endure, persisting over all his attempt to convert her, in his way.
"Hyaaahhn~" but, even when she tried to not let out any obscene sounds, she was still a Human, and a woman. And the Demon Lord is a Demon of Lust, an Incubus who knew how to break and corrupt female like her.
The fact she was able to hold on to her believe and not fall like the others spoke of her strength as an S-rank and her desire to spite the Demon Lord by not falling.
"Even after all the torture I put you through, you still hold on to your believe, little Hero?" the Demon Lord asked.