TheOnlyRaiko
Gonna be honest, as much as I like your story, the forced romance going on with the female oc is killing the story for me. For me it feels like she was created solely for the sake of not pairing your character with a canon one. I overall just don't find her interesting.
Then whats the point in writing fanfiction? Because at the end of the day all the characters are out of character when written by someone other than their creator. And I wouldn't really call her more mature than the other girls rather slightly more experienced. You could easily replace what happened to her with any of the main cast and they would have the same "Maturity " as her.
LiveMan:I actually think the romance with the oc is not forced at all. moreover, I kinda like the oc more than the girls in ua because she is the only one who can keep up in terms of maturity. the use of an oc gives the author incredible amounts of freedom in their interactions without worrying if the character is going ooc or going to make major impacts on the plot.