How to Become Myself (2007)

Juri secretly admires Kanako, who is popular in their class. Juri is like this even at home, where she acts the part of an ideal daughter for her parents because she wants them to stop fighting every day and be loving to each other again. Meanwhile, for no apparent reason, Kanako finds her position in class suddenly plummeting from that of the popular girl to that of the one everybody ignores.