One similar manhwa could be 'Demon King's Bride'. It has elements of fantasy and supernatural like Succubus System.
I'd recommend 'Dark Spell'. It shares the theme of magic and supernatural beings, similar to what you find in Succubus System. The character development and story progression are also engaging.
Chapter 704, "Even if I were a slave, I would be willing!", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. The chapter gives readers a real answer by opening on Wu Daoshan looked at Zhao Lang in shock.
Chapter 864, "What if he just wants to take revenge on you?", is the clearest early answer because it turns Jiang Meng's situation into a concrete plot event. It opens with I did see the robbery star in your Life Plate.
Chapter 714, "I'm Using Voice Input", is the clearest early answer because it turns Using Voice Input's situation into a concrete plot event.
Chapter 511, "I'm Here to Notify You, Not to Discuss With You", is the clearest early answer because it turns Gu Huaijin's situation into a concrete plot event. The chapter turns that into something concrete by moving from The man had changed out of his previously luxurious traditional...
Chapter 744, "Dig Three Feet into the Ground to Find Her!", is the clearest early answer because it turns Mrs's situation into a concrete plot event. The chapter gives readers a real answer by opening on What?!" Wen Jiaojiao directly questioned out loud, "On what basis are...
Chapter 587, "Has He Also Become a Part of the Play?", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with Zhao Lang said "thank you," but his eyes reluctantly glanced at Jiang...
Chapter 482, "Someone Might Need Me", is the clearest early answer because it turns General Dino's situation into a concrete plot event. The chapter turns that into something concrete by moving from Other people caught a glimpse of Zhao Lang's cold and stern face and...
Chapter 349, "Everyone Who Went Out to Dinner that Night Got Poisoned!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The news quickly reached Ye Chu.
Chapter 756, "Birthday Banquet", is the clearest early answer because it turns Sister's situation into a concrete plot event. Early on, On the day of the birthday celebration, the Jiang Family got up early.. By the end, He had previously warned Jiang Li not to make it so grand, but Jiang....