Swordsman and World Pirate, A Brother's Promise.

Hikoboshi World is attacking! But wait... what's that sound? A familiar "Yo-ho-ho!" can be heard faintly in the distance... And the voice of that same person gets powered-up! The shadow of the Yo-ho-ho Worldly Pirates is quickly approaching Saber and the gang! Suddenly, what will become of the destiny of these swordsmen...?!