An explanation for the "Device" that appeared in last chapter and this chapter: it's a technology that compresses an object's volume while maintaining mass. This makes storage and transport very convenient. In the last chapter, weapons were shown to materialize with the passphrase "Device On" and they're compressed enough to fit in a pocket. The testing apparatus debuting in this chapter could be wheeled in on a trolley.
Young Haerang was described as Kyunwoo as being close to his image of the ideal male body. He has a fairly dark tan with very large muscles. Seems like it was cut out from this chapter though. Get ready for a demonstration of his strength next chapter.