If you're looking for manga similar to Hipira: The Little Vampire, you might like these titles.
When Noriko, Amane and their friends left for a week-long summer camp experience in the countryside, they had no idea that they were about to embark on a galactic adventure! After helping a wounded, dog-like alien, the creature offers to take them to a spaceport on the moon where fantastical beings, flashy sights and new friends await them. Together, the gang will travel between worlds, dodge nefarious poachers and even encounter the most famous television show in the galaxy, as they embark on the best summer vacation of their lives!
Kilala is a girl who wants nothing more than to find true love, just like the Disney princesses she loves and admires. One day Kilala finds a beautiful boy passed out on the ground and awakens him with a Sleeping Beauty-style kiss. His name is Rei, and he (and his companion Valdou) are searching for the owner of a tiara; this ‘chosen princess' is said to be able to save their country across the sea. After Kilala's friend Erica is kidnapped for winning a princess contest, Kilala sets forth on an adventure with Rei to find her and beyond. Together, they travel to the worlds of many Disney princesses, make new friends, defeat powerful enemies and even find true love!
If you manage to fill a piggy bank full of forbidden gold coins, any wish of yours will be granted. Those called "bankers" travel the world collecting those coins, and fighting to take them from each other. The energetic young boy Croket sets out on a journey as a banker as well, hoping to have his own wish granted! This is a grand adventure-style story, filled with mystery, laughs, and action!
A boy named Enta is invited to come to the Battle Frontier by Scott. Once there, Enta decides to battle each of the Frontier Brains.