I had to check the novel to see if it was any good, as per usual. The main story is only 12 chapters long, so there are no major plot twists.
Balto's identity isn't obvious, but it's also not surprising. The only shocking thing is that he's supposedly the hidden capture target in the otome game, with the highest level of difficulty, and he's the sexy yandere type. If the novel's rating was higher, it would be three times as long and chock full of bedroom scenes. ╥﹏╥
Poor Heroine-chan is pitiful. She does a lot of dumb things, but please forgive her, she's literally a child. She isekai'd into an R19 game when she was still in primary school, and she's still a child mentally. And her "father" just gave her a supply of aphrodisiacs and sent her to honeytrap the prince. #-.-)