No Infringement Intended video and photos credit to Goo Hye Sun soompi thread Love You Sunnies english sub credit to popgasa.com.
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Seo In Guk "Would We Have Been Happy" feature Goo Hye Sun English sub
What Is SEO / Search Engine Optimization?
SEO stands for “search engine optimization.” It is the process of getting traffic from the “free,” “organic,” “editorial” or “natural” listings on search engines. All major search engines such as Google, Yahoo and Bing have such results, where web pages and other content such as videos or local listings are shown and ranked based on what the search engine considers most relevant to users.