Just because she has the spirit of an adult doesn't mean she's an adult so romance in these situations is always a bit iffy for me and I prefer them transmigrating to an adult if it involves romance but this one especially with all these adult men lusting over a 15 year old is weird to say the least.
Spoilers for ch24/25:
The breaking point for me was the knight misunderstanding her saying she wants to be family especially with an adoption system already set in this world and her being considered a child in this world as well so no different culture thing so even in their world they are creeps and the manga keeps hammering that in and I read from a comment that the creep of creeps imprisoner of his og fl WITH SHACKELS ON HER WHILE SLEEPING the emperor is the ml ugh no thanks. ┑( ̄Д  ̄)┍
No hate to those who want to keep reading to see how it goes but it's defo not it for me. ╮( ̄▽ ̄)╭