Korean film, Inbetween Days,
This is a very quiet and intropective kind of film as a displaced and depressed Korean teenager moves throughout her day with the use of her cell phone, and male pal that she painfull loves. The love is not mutual and her friend takes advantage of her continuing contact in his life base on his convenience. He seems to be more interested in the Americanized Korean girls he meets.
Check this movie out, don't expect martial arts.
The main character is Aimie played by Jiseon Kim.
This film won an award in the Sundance film festival in 2006