SPOILERS - Love interests/rivals , plot twists

Do mind, I have not read the novel for a year (might go for a reread)
However here it goes;
.
.
.
.
.
.
.
.
Prince aquasteed country is full of magic, which includes fairies of various types. When the main female lead goes to Lapis (the country), she is loved by the fairies of the forest however hated by the fairies of the sea (theres a reason for this)
The reason why the fairies of the sea hate the main female lead is because, a princess (I think) of the sea loves aquasteed but as he is taken by the female lead she cannot do anything and just stands by. The princess's mood and such greatly affects the sea fairies. This interferes with the main female lead and aquasteed (as aquasteed is really close to that princess).
Furthermore the reason why the fairies of the forest love the female lead is because their king(?) Took an interest in the female lead. So theres another sub male that lowkey will also interfere.

And before all this happens, that black haired girl or whatever is also a transmigrator, and talks with the main female lead about the game they're in. The black haired girl warns the female lead about the princess of the sea as she is the greatest obstacle. It turns out Black haired girl is actually someone on the female leads side (LowKey~~)