Two rocks are standing side by side in the Sea Manmulsang Section of Sea Kumgang. They so look like an affectionate couple, hence the name Pubu (Couple) Rock. It is called Jama Rock otherwise.

According to a legend, a devoted couple used to have a pleasant time every night at the place, playing the flute, and turned into rocks. An earthworm dancing to the tune of their playing was also turned into a rock, earning the name Jirongi (Earthworm) Rock. Its another name is Kuin Rock.

A rock in Sea Manmulsang that looks like a carp is called Ing-o (Carp) Rock.