Maka's "Rompecabezas" is a passionate plea from someone deeply in love, trying to understand why their affection isn't being reciprocated. The singer is giving their all, offering their life and the "nobleza que tiene mi corazón" [nobility that my heart has], but feels it's being rejected.
He sees love as simple, much easier "Que todo este rompecabezas" [Than all this puzzle], and urges his beloved to shed her fear and kiss him. He wants her to take him, to not let him go, because he believes he's the one who truly loves her. The lyrics are full of longing, with lines like "Eres por quien de noche sueño y por quien vivo de día" [You are who I dream of at night and who I live for by day], and a fear of losing her, wondering how she could doubt his intense feelings.