I'm looking for a manga I read about 4-5 months ago. I can't remember the names of the characters. These are what I can remember:
- It is about a school which only accepts students who can see an island in the sky.
- On the first day, everyone was given a word which turned out to be some kind of power. The main character got the word which allowed him to change his appearance to that of other people.
- Most of the student were killed in the first day by some kind of monster, and there were monsters appearing everyday (except for rainy days).
- There was one student who got the word which made him immortal. Another one got the word which gave him the ability to steal anything (heart, brain, etc.)