Dead End by Manabe Shohei
A strange 4 volume story which kept me interested till the end
It took me a few chapters to get used to the art(although i don't think i ever really got used to it) but it is quite well drawn.
Not very good at explaining things, so hopefully someone else will come along...........my apologies.
Well worth the read if you're looking for something new or complete.
Okay so no-one came along, description from the first few chapters.(from mangaupdates)
Shirou's ordinary life as a poor construction worker gets turned upside down when he comes across a naked girl, Lucy, who's fallen out of the sky! Her strange and unique personality entices him and he introduces her to his apartment buddies.
But after leaving for just a few minutes, he returns to the apartment to find Lucy gone, all his friends slaughtered and an ogre-like stranger standing amidst the carnage.
The big man suddenly pulls Shirou out of the apartment building just before it explodes! Shirou gets pushed down into the sewage system of the city and is saved by a mysterious man...