I honestly can’t fathom why Diane Kruger accepted a role in this movie. It's another predictable story filled with adolescent melodrama, seemingly designed to capitalize on the popularity of Hero Fiennes Tiffin's "After..." series of forgettable young love tales. Here, he ("Jim") becomes infatuated with a classmate ("Ann," played by Sydney Park), but for reasons that remained unclear to me, she ends their relationshi…