As someone who read the novel (it's been a while tho, so things might not be totally exact...

As someone who read the novel (it's been a while tho, so things might not be totally exact), I have to give an explanation. A lot of stuff was skipped in this chapter. For 1, MC was a ~40 year old Earth man who randomly woke up in this new world in his ~12 year old body. Humans are rare, much less with black hair and eyes. Beastman instantly kidnapped him and he's been a slave for a long time (forgot how long). It took weeks for him to heal, not just day btw. Also this one chapter is like the first ~10 chapters combined. And this novel is m-preg. And that's my mini summery of stuff they missed