Birdsnest Hostel Hongdae 

This hostel is very underrated. I can't quite comprehend how it's rating is 7/10 on many booking sites. For the price that I paid (about £7.80) per night, the value was exceptional. The entire place was organised efficiently whilst maintaining a volunteer based friendly atmosphere. They have volunteers from Germany, the U.S. and South Africa and this makes for a fun environment. I unfortunately only snapped one picture as I was leaving, however, there is a very spacious upstairs too with lots of common space as well as an outside area. The location is great and there is a kitchen with a stove, microwave and hot water dispenser. Towels are included, as are bathroom soaps and shampoo. Would recommend 110% if the price is right.