For the record, this has nothing to do with One Piece. Piece: Kioku no Kakera is in fact a mystery film where Kamen Rider OOO's two main actors Shun Watanabe and Ryosuke Miura are teaming up to solve a mystery where people are being turned into stone.
Even though Piece is suppose to have a more mature tone, I
guess Miura could not resist having a silly hair style in his new role.
But then again, it works well for a character that is suppose to show
off five different personalities in the movie.