Enchanting Music

A beautiful tune is played. Of all who hear, the caster chooses one target to effect. This target must make a DC 15 wisdom saving throw or be enchanted by the caster. They must follow the caster's instructions until the spell is dismissed. However, every time the caster gives them a command, the target makes  DC 18 wisdom saving throw to escape the hold of the spell. While under the spell, the target is exactly the same. They merely follow the caster's command without question.