This Eroge Game Is Definitely Not Right!

After dying from overplaying an eroge game, Li Feng transmigrates into a third-rate sword-and-magic farming simulation eroge. He lands as the officially designated heaven-chosen protagonist—with a genius mage fiancée, a silver-haired indebted grand duchess, a fallen elf princess, a dignified dragon lady, and more. A harem, high status, and a peak starting point—the ultimate elite script. Li Feng is ecstatic, ready to enjoy every bit of it. But then he discovers the world line has shattered. The monster tide doesn't follow the original plot and spawns right at his territory's doorstep. Worse, the boss leading that tide is a high-rank succubus—except this one has tentacles. What kind of succubus has tentacles?!