yes, i agree. i felt really bad the whole time but the novel focuses a lot more on the misunderstanding. yumin was really scared because he thought that tajun didn't like him and just got close to him to eat him. he's also scared because he's a tiger. and then he found out he was pregnant. so the only reason why it seemed that scary was because yumin actually thought he's gonna die.
they could have definitely handled it better but i feel like in the manhwa tajun is suddenly turning into a red flag but in the novel we definitely get more context than right now

guys that did NOT happen in the novel!!
i won't spoil anything but tajun didn't lockhim up in the novel