the thread is dedicated for that type of manga
the first one is
vampire wing by mangaka Etorouji Shiono
In the not so distant future, Earth is invaded by aliens. The United Nations instates a draft, and all humans on Earth are eligible to become soldiers. Kurando Nieno is a rather scrawny high school student, scoring the lowest scores possible on the preliminary draft physical. During an air raid from the aforementioned aliens, a rather irritable black haired girl crash lands in front of Nieno and attempts to drink his blood. The United Nations air force and Eliza the vampire have selected Nieno as Eliza's delicious new food source!
even if it is just a oneshot i think that it has potential
and then there's
Island (KOMI Naoshi) by KOMI Naoshi
A story that takes place on the day Aira turned 14, and learned the devastating truth about the island she lives on, which is completely surrounded by a huge wall...
a very good story
and then there's
Apple also by KOMI Naoshi
The main character (the blond ponytailed guy - yeah, guy) is Aramiya Satoshi, who main ability is shapeshifting into any animal ...though at a few points he has plants growing out of him, so my guess is he can shapeshift into any living thing (including an elephant and a lion) I'm not sure if he was naturally born that way or if he was a biological experiment. Anyway, he's a pretty easygoing guy who just wants to be left alone to enjoy his solitary life in the middle of a junkyard, but apparently some army or another is always after him because of his ability, though he is able to fight off entire tank battalions before breakfast.
hmm i think this is gonna be a very long post...so that's it for now, i'll post some other later, or if you wanna post go on