Jigsaw Puzzle is an original song by Mafumafu and is one of his most notable songs. This song describes a person who is unfeeling, described to be "heartless" in some translations, and continuously looking for the "missing piece" that is their heart. Note: There exists two versions of this song; the first being a vocaloid version featuring Len Kagamine uploaded on Nov 23, 2018 and a self-cover version by Mafumafu himself, which was uploaded later on Nov 28, 2018. (Source: AniList)