TWGOK is a really interesting harem manga. We have demons, angels, gods, time travelers, galgame concepts, and a lot of different characters (choose your favourite). Some fans claim it's a legendary manga (well, it is if you are a date simulator fan). The manga originally started as a one shot, then later it got serialized with some minor changes in its plot.
Name: The World God Only Knows
Scanlator: Red Hawk Scanlations
Current Progress: Chapter 243
Read Online: Read Online Here
Red Hawk doesn't scanlate ecchi/harem manga too often, but they're doing a great job with this manga. For those who are fans of dating simulators, eroges, and gal games. TWGOK is certainly the best manga out there for you.