 If you liked
Kuro
|
 ...then you might like
Chikyuu no Houkago
|
Well, apparently these black scary monsters invade earth regularly, here's one set it the 20th (perhaps) and one contemporary. In both manga there's a calm and peaceful existence until those pesky monster arrive and eat everyone. Kuro is way better though, but Chikyuu no Houkago is perhaps a bit funnier.