If you're looking for manga similar to Bloody Planet, you might like these titles.
Kei was known as a cry-baby when he was a kid, but luckily he had his best friend, Honoka, who would magic away his sadness using an hour-glass. Now that he is no longer a child, Kei and Honoka’s relationship is being tested as they grow apart. Then one day, the world as we know it is changed by a UFO that visits earth, calling for volunteers to join them. With the world in an uproar, what will happen to Kei and Honoka’s relationship?
Among the humans who walk the earth, also exist many aliens. The vast array of aliens can use abilities like telepathy, spells, and will even blow up whole planets! Perhaps that’s why they look down on us humans, but one thing is for sure, they love drinking just as much as we do! What appears to be just a friendly drinking party between young male and female aliens is actually not as innocent as it seems. What exactly will unfold by the end of the night?
School trips are always fun, but they get even better when you're taken to an alien planet you've never visited before. However, this planet isn't exactly safe for a bunch of human students...
Another Earth has been discovered by an astrologer in the US, giving it the name "Jamais Vu". That Earth is soon discovered to be a group of aliens, going around the galaxy before arriving in the actual Earth to kill people and appear like them.
16-year-old Gizagaki Fuji always had a temper and hated the idea of romance. A shooting star suddenly crashed into him and now he's become an alien's spaceship?!