The terms "s2couple19," "eolgongchuga," and "indo18" appear to be specific digital identifiers, often associated with niche social media trends, account usernames, or localized internet slang that have not entered mainstream academic or general documentation.
얼공 (eolgong) is a shortened form of 얼굴 공개 (face reveal) or sometimes 얼굴 공격 (face attack, i.e., visually striking appearance).추가 (chuga) means "addition" or "extra.": Frequent users of these platforms use IDs like "s2couple19" to follow specific "creators" or distribution channels that regularly post amateur couple content. Face Reveals s2couple19 eolgongchuga indo18 new
Based on the structure, the phrase appears to be a mix of: 얼공 (eolgong) is a shortened form of 얼굴