Personally i like any story (game/movie/manga/anime/literature) about pre or post apocalypse. That is why, after finishing yet another story, i decided to look for something new and found "Chikyuu no Houkago". Synopsis looked interesting so i jumped in right away and even blitzed it in one go.(because i'm nuts :)) It was better than expected, but still it could have been so much better! Story is pretty short and centers around 4 character. It's your average Harem setting, 1 strong guy and 3 girls. Girls pretty much do nothing but talk about boobs or how to seduce the guy or repopulate the world while this guy is doingeverything except for what the girls WANT from him. From all 4 characters, the only male is the best developed character, but i found him pretty boring and simple (typical "good at everything/knows everything MC).
Character development is the weakest side of this manga, but you can feel some personalities in them and they won't annoy you (maybe). Author should have spent more time on character development rather than spamming word "boobs" and "breasts"...

Art - Impressive. backgrounds are very well done. Definitely the strongest side of this manga.

Story - 4 kids seem to be the only survivors on planet Earth after an unknown enemy called "phantoms" made the mankind disappear. The story is 80% about what the kids do on their own in an empty world and 20% about finding answers on very important questions, some action here and there, and actually doing something important in the story!

If this genre is not new to you, you will most likely guess how the story ends even before reading the half of the story.

Don't expect thrill or horror, don't expect huge plot twists; there are one or two disturbing moments and nudity (95% censored). It's an easy read, but i certainly enjoyed reading it and would recommend this manga to you too, BUT...

If you want something better, try these instead:
manga:
1) Gakkougurashi - for horror/mystery/action
2) Shoujo Shuumatsu Ryokou - Drama/good atmosphere/well developed characters