Jigokusei Remina
地獄星レミナ
One day, the world found out about newly discovered star, that was "eating" other stars. At first, it was so far away, that it became just a nice curiosity entertaining people in their normal daily lives. Then, it begun to come closer and closer, finally eating some of the solar system's planets and taking a straight course for Earth itself...
Hellstar Remina is a spectacular tale of ultimate and unavoidable destruction of humankind, that came unexpected and without humanity's own "help". It's also a solid overview of how people can't cope with their own most primitive instincts (blind revenge), even in the face of final doom.
( rewritten from a short note on one of the Junji Ito's fanforums & mentionings on 4chan's bbs)