Twin brothers were separated after the divorce of their parents. Our heroine likes one of the brothers, but mistakes the other brother for him when they are training in the same ballet school...

The main character, Haganemaru, is rescued by a certain woman while eating and running at a dumpling shop. The woman's name was Princess Oe Byakuren, and she was the daughter of a feudal lord who died in a confrontation with a demon. While talking to Haganemaru about his father, the demon that killed his father appears from the tombstone and attacks them. Haganemaru confronts the demon, but the opponent is the owner of an immortal body that can be restored even if his head is cut off...

The main character Blandina (named Gunborg VZ in the beginning), who was flying around the earth, was attacked by a ship and appeared before the boy Daichi and the girl Ushio. Daichi and Ushio named it Gunborg VZ, allowing them to communicate with each other. There, the space pirate saloon, who was the one who attacked the ship, appeared. Daichi and Gunborg VZ work together to confront the formidable Saloon.