Lovestruck Exorcist

Help! An incubus that died a virgin has possessed me! Exorcist Palmoon Han gets a call from a man in distress. His new client, Dun-gab, has a few options to free himself from the demon, but none of them seem adequate. To help his client, Palmoon makes Dun-gab an offer he can't turn down. How will this offer help Dun-gab gain freedom from the incubus?