PiecePiece.

Piece, originally serialized as Piece: Kanojo no Kioku (Japanese: Piece～彼女の記憶～; lit. "Piece: Her Memory"), is a Japanese manga series written and illustrated by Hinako Ashihara. It was serialized in Shogakukan's Betsucomi magazine, premiering in the May 2008 issue and concluding in the May 2013 issue (each one released on April 13 in their respective years.) Shogakukan collected the individual chapters into 10 bound volumes from December 2008, to June 2013.