To Make Money, I Had No Choice but to Become a Succubus

Gris transmigrated to a world where steam and the supernatural intertwine. He had nothing to his name and owed the government three hundred gold coins. But this was Bristown, the most prosperous port city in the Kingdom of Ellis. People here might not have a life, but they always had something going on: Why was a noble boy having sex with a cat in broad daylight? What kind of deal had the police chief struck with a succubus? How had a teacher at the academy raked in over a thousand gold coins? Faced with such bizarre people, Gris could only rely on his occult bestiary to “struggle to survive” among this crowd of weirdos. [Black Tide Crab, Bestiary No. 487: At two meters tall, it's a giant even among Black Tide Crabs. Unfortunately, it was killed by a hunter while competing with its own kind.] [Succubus, Bestiary No. 167: After a day of being hunted, she's getting impatient. Can you satisfy her?] Satisfy who? The succubus? After barely escaping death, Gris gained the succubus's spiritual essence. He had thought he could easily enter the realm of the occult, but now he was at a loss. Why was there a formula for becoming an occultist?! [Detective: Succubus potion + Calamity-Scaled Serpent potion = Detective-type occultist] [Dancer: Succubus potion + Soft-Boned Rabbit potion = Dancer-type occultist] What happens if you don't complete the formula before the potion is fully digested? [Potion digestion: As time passes and you frequently use spiritual arts, the potion will be digested. If the potion isn't fully digested